You must enter a partner function for the partner number

What causes this issue?

You have entered a partner number for the selection, but have not
entered a corresponding <GL:partner_function>partner function</>.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Enter the partner function that corresponds with this
<GL:partner>partner</>.

Error message extract from SAP system. Copyright SAP SE.