I have a codeigniter4 application.
When i set public $regenerate = true; in Security.php
the view with a form submit to add employee redirects to itself on submit. But when regenerate is false, code submits to the controller and data is processed as required
How can i solve the issue with regenerate set to true?.

The controller function handling add_employee is:

public function add_employee()
    {
        $session = session();
        $request = ConfigServices::request();
        $db = ConfigDatabase::connect();
       
        $usermodel = new AppModelsUserModel();
        $data['user']=$usermodel->getRow($session->get('email'));
        $data['title'] = 'Add employee';

        $employeemodel = new AppModelsEmployeeModel();
        $divisionmodel = new AppModelsDivisionModel();
        $userRoleModel = new AppModelsUserRoleModel();

        $data['employee'] = $employeemodel->getAll();
        $data['designation'] = $employeemodel->getAllDesignations();
        $data['division'] = $divisionmodel->findAll();
        $data['roles']  = $userRoleModel->findAll();
        
        
         $role_id= $data['user']['role_id'];
        if($role_id==5||$role_id==10){ //Division Admin or Division head

         $builder=$db->table('tbl_division');
         $builder->select('tbl_division.int_divisionID');

             if($role_id==5){         
            
                 $builder->join('tbl_administrator','tbl_administrator.int_divisionID=tbl_division.int_divisionID');
            } else{
                $builder->join('tbl_employee','tbl_employee.int_divisionID=tbl_division.int_divisionID');
            }

         $division=$builder->get()->getRowArray();
         $data['selected_division'] = $division['int_divisionID'];

         $builder=$db->table('tbl_department');
         $builder->select('tbl_department.int_departmentID,tbl_department.vchr_departmentName');
         $builder->where('tbl_department.int_divisionID',$division['int_divisionID']);
         $data['department']= $builder->get()->getResultArray();
        }
         elseif($role_id==11)//Department Head
         {
          $builder=$db->table('tbl_employee');
          $builder->select('int_departmentID');          
          $builder->where('tbl_employee.int_userID',$data['user']['id']);
          $department = $builder->get()->getRowArray();          
          $department_id = $department['int_departmentID'];
          $data['department_id']=$department_id;

          $builder=$db->table('tbl_department');
          $builder->select('tbl_department.int_divisionID');
          $builder->where('tbl_department.int_departmentID',$department_id);
          $division=$builder->get()->getRowArray();
          $data['selected_division'] = $division['int_divisionID'];

          $builder=$db->table('tbl_department');          
          $builder->select('tbl_department.id,tbl_department.int_departmentID,tbl_department.vchr_departmentName');
          $builder->where('tbl_department.int_divisionID',$division['int_divisionID']);
          $data['department']= $builder->get()->getResultArray();
         }

        
        if ($this->request->getMethod() == "post") {

            
             $validation =  ConfigServices::validation();

             $_POST['csrf_test_name']=$_REQUEST['csrf_test_name'];

             $rules = [
           
                    "csrf_test_name" => [
                        "label" => "CSRF Token Name",
                        "rules" => "required|trim|alpha_numeric|max_length[64]"
                    ],
                    "vchr_CDIT_employeeID" => [
                        "label" => "CDIT EmployeeID",
                        "rules" => "required|trim|alpha_numeric|max_length[10]"
                    ],
                    "vchr_employeeName" => [
                        "label" => "Employee Name",
                        "rules" => "required|trim|alpha_space|max_length[100]"
                    ],
                    "vchr_email_id" => [
                        "label" => "Email",
                        "rules" => "required|trim|valid_email|max_length[100]"
                    ],
                    "int_mobileNo" => [
                        "label" => "Mobile No",
                        "rules" => "required|trim|numeric|max_length[10]|min_length[10]"
                    ],
                    "int_empType" => [
                        "label" => "Mobile No",
                        "rules" => "required|trim|numeric|max_length[3]"
                    ]
                    
                ];

                 $int_empType = $request->getPost('int_empType');
      
      
      if(!($int_empType==7 || $int_empType==8)){


        $rules1= [
            "int_designationID" => [
                        "label" => "Designation",
                        "rules" => "required|trim|numeric|max_length[4]"
                    ],
            "int_divisionID" => [
                        "label" => "Division",
                        "rules" => "required|trim|numeric|max_length[4]"
                    ]

        ];

        $rules=array_merge($rules,$rules1);
        
        }

        if(!($int_empType==7 || $int_empType==8 || $int_empType==9 )){

        
        $rules1= [
            "int_departmentID" => [
                        "label" => "Department",
                        "rules" => "required|trim|numeric|max_length[4]"
                    ]

        ];

         $rules=array_merge($rules,$rules1);

        }
       
        if (!($this->validate($rules))) {   

                $session->setFlashdata('employeemessage', '<div class="alert alert-danger" role="alert">
                Validation Errors!</div>');
           
                return redirect()->back()->withInput();
           
            } 
        else{
                
                $email = strip_tags($request->getPost('vchr_email_id'));
                $name = strip_tags($request->getPost('vchr_employeeName'));

         

          $employeeemailexists = $employeemodel->where('vchr_email_id',$email)->first();
          
          if($employeeemailexists){

             $session->setFlashdata('employeemessage', '<div class="alert alert-danger" role="alert">
             employee Creation Failed. employee with this email already exists</div>');
             return redirect()->to('employee');
            
          }

          $userdata  = $usermodel->where('email',$email)->first();
          if($userdata){

            $session->setFlashdata('employeemessage', '<div class="alert alert-danger" role="alert">
             User Creation Failed. User with this email already exists</div>');
             return redirect()->to('employee');
            
          }
          $date_created = date("Y-m-d H:i:s", time());

          $comb = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*_-";
          $shfl = str_shuffle($comb);
          $pwd = substr($shfl,0,12);
          $data = [
              'name' => $name,
              'email' => $email,
              'image' => 'default.jpg',
              'password' => md5($pwd),
              
              'role_id' => 4,
              'is_active' => 1,
              'isFirstLogin' => 1,
              'date_created' => $date_created
          ];

         $token = base64_encode(random_bytes(32));

         
          $emailstatus=sendemail($name,$email,$token,$pwd, 'verify');

          if(!$emailstatus){
               
                $emailmsg='<span class="alert alert-danger" role="alert">Password couldnot be send through email.Check mail configuration</span>';

            }
            else
                $emailmsg='<span class="alert alert-success" role="alert"> Password send to employee email </span>';
           $usermodel->insert($data);
          
           $res=$usermodel->where('email',$email)->first();

            $insert_id=$res['id'];

            $employeemodel->saveToDB($insert_id);

            $session->setFlashdata('employeemessage', '<div class="alert alert-success" role="alert">
                Employee added successfully!.Password is <b>'.$pwd.'</b></div>'.$emailmsg);
                return redirect()->to('employee');
            }
        }
        else{
            echo view('templates/admin_header', $data).
            view('templates/admin_sidebar').
            view('templates/admin_topbar', $data).
            view('employee/add_employee').
            view('templates/admin_footer');
        }

      
    }

My view add_employee

<!-- Begin Page Content -->

<div class="container-fluid">

    <!-- Page Heading -->
    <h1 class="h3 mb-4 text-gray-800">Add Employees </h1>

    <div class="card shadow mb-3">
        <!--<div class="card-header">
            Add Employees
        </div>-->

        <div class="card-body">
        <div style="display: flex; justify-content: flex-end"> <button  onclick="history.back();"><i class="fas fa-arrow-left"></i> Back</button>
            </div>
          <?php
          $attributes = array('id' => 'myform');
          echo form_open('employee/add_employee',$attributes);?>


                <div class="form-group">
                    <label for="vchr_CDIT_employeeID">CDIT Employee ID<font color="red"> *</font></label>
                    <input class="form-control" maxlength="100" 
                    type="text" name="vchr_CDIT_employeeID" placeholder="Enter CDIT Employee ID"
                    value="<?= set_value('vchr_CDIT_employeeID'); ?>">
                    <?= form_error('vchr_CDIT_employeeID', '<small class="text-danger pl-3">', '</small>'); ?>
                </div>
                <div class="error" width="100%"></div>


                <div class="form-group">
                    <label for="vchr_employeeName">Employee Name<font color="red"> *</font></label>
                    <input class="form-control" maxlength="100" 
                    type="text" name="vchr_employeeName" placeholder="Enter Employee Name" value="<?= set_value('vchr_employeeName'); ?>">
                    <?= form_error('vchr_employeeName', '<small class="text-danger pl-3">', '</small>'); ?>
                </div>
                <div class="error" width="100%"></div>


                <div class="form-group">
                    <label for="vchr_email_id">E-Mail ID<font color="red"> *</font></label>
                    <input class="form-control" maxlength="100" 
                    type="email" name="vchr_email_id" placeholder="Enter Email ID" value="<?= set_value('vchr_email_id'); ?>">
                    <?= form_error('vchr_email_id', '<small class="text-danger pl-3">', '</small>'); ?>
                </div>
                <div class="error" width="100%"></div>


                <div class="form-group">
                    <label for="int_mobileNo">Mobile Number<font color="red"> *</font></label>
                    <input class="form-control"
                    type="text" minlength="10" maxlength="10" name="int_mobileNo" placeholder="Enter Mobile Number" value="<?= set_value('int_mobileNo'); ?>">
                    <?= form_error('int_mobileNo', '<small class="text-danger pl-3">', '</small>'); ?>
                </div>
                <div class="error" width="100%"></div>
                
                <div class="form-group">
                    <label for="int_empType">Enter Employee Type <font color="red"> *</font></label>
                    <select name="int_empType" id="int_empType" class="form-control">
                      <option value="">---Select Role---</option>
                      <?php foreach ($roles as $r) : ?>
                      <?php 
                     
                     if(!in_array($r['id'],[1,3,5]))
                      {
                      
                      ?><option value="<?= $r['id']; ?>"><?= $r['role']; ?></option>
                    <?php } endforeach; ?>
                      </select>
                      <?= form_error('int_empType', '<small class="text-danger pl-3">', '</small>'); ?>
                </div>
                <div class="error" width="100%"></div>

                <div class="form-group" id="divisionDiv">
                    <label for="int_divisionID">Enter Division <font color="red"> *</font></label>
                    <select name="int_divisionID" id="int_divisionID" class="form-control"
                    
                    >
                    
                     <?php if(isset($selected_division)) { 
                     foreach ($division as $d) :
                     if($d['int_divisionID']==$selected_division){
                     ?>
                    >
                     <option value="<?= $d['int_divisionID']; ?>" selected > <?= $d['vchr_divisionName']; ?></option>
                    <?php
                    } endforeach;
                    } else {
                    ?>
                    
                    
                        <option value="">---Select Division---</option>
                        <?php foreach ($division as $d) : ?>
                        <option value="<?= $d['int_divisionID']; ?>"                     
                        >
                        <?= $d['vchr_divisionName']; ?></option>
                        <?php endforeach; }?>
                    </select>
                    <?= form_error('int_divisionID', '<small class="text-danger pl-3">', '</small>'); ?>
                </div>
                <div class="error" width="100%"></div>

                <div class="form-group" id="deptdiv">
                    <label for="int_departmentID">Enter Department <font color="red"> *</font></label>
                    <select name="int_departmentID" id="int_departmentID" class="form-control">
                    <?php if(isset($department_id)) { 
                     foreach ($department as $d) :
                     if($d['int_departmentID']==$department_id){
                     ?>
                   
                     <option value="<?= $d['int_departmentID']; ?>" selected > <?= $d['vchr_departmentName']; ?></option>
                    <?php
                    } endforeach;
                    } else {
                    ?>
                        <option value="" selected>---Select Department---</option>
                        <?php if(isset($department)){
                         foreach ($department as $d) : ?>
                        <option value="<?= $d['int_departmentID']; ?>">
                        <?= $d['vchr_departmentName']; ?></option>
                        <?php endforeach; }
                        
                        }?>

                    </select>
                    <?= form_error('int_departmentID', '<small class="text-danger pl-3">', '</small>'); ?>
                </div>
                <div class="error" width="100%"></div>


                <div class="form-group" id="desigDiv">
                    <label for="int_designationID">Enter Designation <font color="red"> *</font></label>
                    <select name="int_designationID" id="int_designationID" class="form-control">
                        <option value="">---Select Designation---</option>

                    </select>
                    <?= form_error('int_designationID', '<small class="text-danger pl-3">', '</small>'); ?>

                </div>
                <div class="error" width="100%"></div>


                <!-- button save -->
                  <div class="form-group">
                        <button type="submit" class="btn btn-success" >Add Employee!</button>
                    </div>
            </form>
        </div>

        <div class="card-footer small text-muted">
        <font color="red"> *</font> must be filled
        </div>
    </div>

</div>
<!-- /.container-fluid -->

</div>
<!-- End of Main Content -->

</div>
<!-- /.container-fluid -->

</div>
<!-- End of Main Content -->

<script type="text/javascript">


$('#int_divisionID').on('change', function(){
    var int_divisionID = $('#int_divisionID').val();
   
     var csrfName = "csrf_test_name";
    var csrfHash = $('[name="csrf_test_name"]').val();

    $.ajax({
        type:"POST",
        url: "<?php echo site_url('Department/getDepartments')?>",
        data: {[csrfName]: csrfHash, int_divisionID: int_divisionID},
        success:function(response){

            $('#int_departmentID').html('<option value=""> ---Select Department--- </option>');
            $.each(JSON.parse(response), function(key,val) {
                $('#int_departmentID').append('<option value="' + val.id + '">'+ val.vchr_departmentName +'</option>');
            });
        }
    });


});

$('#int_departmentID').on('change', function(){
    var int_divisionID = $('#int_divisionID').val();
   
     var csrfName = "csrf_test_name";
    var csrfHash = $('[name="csrf_test_name"]').val();
$.ajax({
        type:"POST",
        url: "<?php echo site_url('Department/getDesignations')?>",
        data: {[csrfName]: csrfHash, int_divisionID: int_divisionID},
        success:function(response){

            $('#int_designationID').html('<option value=""> --Select Designation-- </option>');
            $.each(JSON.parse(response), function(key,val) {
                $('#int_designationID').append('<option value="' + val.id + '">'+ val.vchr_designation +'</option>');
            });
        }
    });
});
</script>

<script type="text/javascript">

$(document).ready(function() {

$('#int_empType').on('change', function(){
 var int_empType = $('#int_empType').val();
 if(int_empType==7 || int_empType==8 || int_empType==9 ){
 $('#deptdiv').hide();
 $('#int_departmentID').val(0);
 }
 else{
 $('#deptdiv').show();
 $('#divisionDiv').show();
  $('#desigDiv').show();
 }
 if(int_empType==7 || int_empType==8){
 
  $('#divisionDiv').hide();
  $('#desigDiv').hide();
  $('#int_divisionID').val(0);
  }
  else{
  $('#divisionDiv').show();
  }
 
});

 var int_divisionID = $('#int_divisionID').val();
    
    var csrfName = "csrf_test_name";
    var csrfHash = $('[name="csrf_test_name"]').val();
$.ajax({
        type:"POST",
        url: "<?php echo site_url('Department/getDesignations')?>",
        data: {[csrfName]: csrfHash, int_divisionID: int_divisionID},
        success:function(response){
            $('#int_designationID').html('<option value=""> --Select Designation-- </option>');
            $.each(JSON.parse(response), function(key,val) {
                $('#int_designationID').append('<option value="' + val.id + '">'+ val.vchr_designation +'</option>');
            });
        }
    });

jQuery.validator.addMethod("name_check", function(value, element) {
return this.optional(element) || /^[a-zA-Zs.-]+$/.test(value);
});

jQuery.validator.addMethod("CDIT_employeeID", function(value, element) {
return this.optional(element) || /^[a-zA-Z0-9s.-]+$/.test(value);
});

jQuery.validator.addMethod("email_check", function(value, element) {
return this.optional(element) || /^[a-zA-Z0-9._-]+@([a-zA-Z0-9-]+.[a-zA-Z])*[a-zA-Z0-9-]+.[a-zA-Z]{2,5}$/i.test(value);
});

jQuery.validator.addMethod("phonenumber", function(value, element) {
return this.optional(element) || /^d{10}$/.test(value);
});


$("#myform").validate({

rules: {

vchr_CDIT_employeeID: {

required: true,
CDIT_employeeID:true,

},

vchr_employeeName: {

required: true,
name_check:true,

},

vchr_email_id: {

required: true,
//email_check:true,

},

int_mobileNo: {
required:true,
minlength:10,
maxlength:10,
phonenumber:true,

},

int_divisionID:{
  required: {
                depends: function(element) {
                    return (!($('#int_empType').val()==7 || $('#int_empType').val()==8))
                }
                }

},

int_departmentID :{
  required: {depends: function(element) {
                    return (!($('#int_empType').val()==7 || $('#int_empType').val()==8 ||  $('#int_empType').val()==9))
                }}

},

int_designationID: {
  required: {depends: function(element) {
                    return (!($('#int_empType').val()==7 || $('#int_empType').val()==8 ||  $('#int_empType').val()==9))
                } }
},



int_empType: {
  required:true,
},


},
messages: {

vchr_employeeName: {
required: "<font color='#FF0000'> Employee Name required !!</font>",
name_check:"<font color='#FF0000' > Invalid Special characters in Employee Name!!</font>"
},

vchr_email_id: {
required: "<font color='#FF0000'> E-mail ID is required !!</font>",
//email_check: "<font color='#FF0000'> Invalid Email Format !!</font>",
},

int_mobileNo: {
  required: "<font color='#FF0000'> Mobile Number is required !!</font>",
  minlength : "<font color='#FF0000'> Mobile Number should be of 10 characters long !!</font>",
  maxlength : "<font color='#FF0000'> Mobile Number should be of 10 characters long !!</font>",
  phonenumber : "<font color='#FF0000'> Mobile Number is Invalid !!</font>",
},

vchr_CDIT_employeeID :{
  required: "<font color='#FF0000'> CDIT Employee ID required !!</font>",
  CDIT_employeeID : "<font color='#FF0000'> Invalid Employee ID !!</font>",

},

int_divisionID :{
  required: "<font color='#FF0000'> Division required !!</font>",

},

int_departmentID :{
  required: "<font color='#FF0000'> Department required !!</font>",

},

int_designationID :{
  required: "<font color='#FF0000'> Designation required !!</font>",

},

int_empType : {
  required: "<font color='#FF0000'> Employee Type required !!</font>",

},


},
errorElement: "span",
errorPlacement: function(error, element) {
  error.appendTo(element.parent("div").next());
},
submitHandler: function (form) {
            /*var key = "eTicketingCI4CDIT#$abc";
            var form = document.getElementById("myForm");
            var inputs = form.getElementsByTagName("input");

            for (var i = 0; i < inputs.length; i++) {
                var input = inputs[i];
                if (input.type !== "submit" && input.type !== "button") {
                    var encryptedValue = CryptoJS.AES.encrypt(input.value, key).toString();
                    input.value = encryptedValue;
                }
            }*/
              
              form.submit();
          }

});

});


</script>