Get request return same data (doesn’t refresh database)

I am using the SLIM 3.9 framework as an API and as a client a web page in javascript. I have the following problem, when I insert new information from the client side to the database, the record is created correctly at the mysql level, but when I try to consult it at the javascript level, it does not return the last inserted record, it seems that the browser caches the GET request. I have tried to pass in the NO-CACHE header but without success. Does anyone know what could be going on? By the way, if I change the method to POST I have no problem, but with GET it seems that a type of cache is created. Can anyone help me. Thanks

My Javascript method:

getLastRegister(){
    
 var myHeaders = new Headers();
myHeaders.append('pragma', 'no-cache');
myHeaders.append('cache-control', 'no-cache');  

    
return new Promise((resolve, reject) => {    
    
 let self = this;    
 
 let month = ""
 let year = ""
    
    
fetch('/xxxxxx/api/xxxxxxx/getLastRegister', {
  method: 'GET',
  headers: myHeaders 
})
  .then(response => response.json())
  .then(data => {
      
      
      if(data.success){
      


      data.data.forEach((e)=>{

        console.log(e);
    
        month = e.month;
        year = e.Year;
            
          
          
      });
      
    resolve({year:year, month:month})
    
      }
      else{
          
          
    self.alertError.customMsg.innerHTML = 'A error was ocurred: '+data.message;
    self.alertError.show(); 
    
     console.error('Error:', data.message);

     reject(data.message);

          
      }

      
  })    
  .catch((error) => {
    
  self.alertError.customMsg.innerHTML = error;
  self.alertError.show();  
 
  console.error('Error:', error);
  
  reject(error);
  
});
    
    
});    
    
    
}