Data from ajax in datatables not sending to server using POST php

i’m creating a POS app using php which have a list of products like this
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but the data inside datatables were not send to server, the data is from point 1 it’s a selectable data from server, if i click on of the data the values of that data will be stored inside point 2.But after i click save the data inside point 2 were not send, there’s no data inside my table. But if i hard coded the value to point 2, it’s send to server and the data exist on the table.

Why is that?

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see the 4th and 5th value, number 4 is a hardcoded value and the 5th was from server using ajax, after i hit save, this happen

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the 5th value is not send to server, did anyone knows what is happening here? any thought would be very helpful.