Edit field on Sales Invoice Header Table 112

Hello
We have created a function to a customer, where we mark invoices on Table 112 Sales Invoice Header to be mailed via a job queue, which only will run one time daily.

But when we try to edit the field - with the customer's NAV license, we get an error:

You do not have the following resrictions on Table Data Sales Invoice Header: Modify.
But if we use our Partner NAV codes the function works fine.


Can anyone help with an explanation / solution ??