Hi everyone, basically I am trying to create a book reservation system. In the main page, the user will be able to click on a book from a list and the book info will then be transferred to another list called the reservationlist in another screen. So far I am able to transfer 1 data to the other screen but whenever I tried to go back to the 1st screen and I tried to send another data to the other list, it will replace the previous data in the list. I suspect the problem lies in the start value that I send to the other screen but I'm not so sure about this. Here are the sample of the coding blocks of screen 1 and 2.
Anyone know how to solve this? English is not my first language so I am sorry if there's any mistake.