Error from: Opening Invoice Creation Tool

I created a custom doctype “Container” and added it as link field in Opening Invoice Creation Tool Item. Upon creation of Opening Invoices there is an error: Row one container field can not be blank. After sometime, I deleted the field from OICTI, but still getting the same error. I even tried to reset the OICTI form in customization and deleting the Container doctype itself but it didn’t work.

Same field is working fine in Sales Invoice Item.

ERPNEXT V13
Frappe v13