This page was originally a modal page in another application within the same workspace. I first converted it to a normal page, then copied it into my main application.
Now, when I click the "Submit" button, I encounter the following error:
"Item ID (P3912_HEADER_ID) is not an item defined on the current page."
I don't understand why this error is occurring because the item (P3912_HEADER_ID) is already present on the page. Even when I change the item field name, the issue persists.
The item field template is set to "Optional Above," and all other item field and region templates seem to be correct.
Could someone explain why this issue is arising and how to resolve it?