Error implementing BAdI ISU_EDM_BILL_CHECK

What causes this issue?

You have defined method CHECK_CHANGES_ALLOWED of the BAdI
ISU_EDM_BILL_CHECK. This method is called within the function module, in
order to execute customer-specific checks to see whether an EDM profile
can be changed.

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

Profiles that the system has indicated as changeable can be indicated as
<ZH>not</> changeable within this method.
You have indicated a profile as changeable, although the system has
indicated it as <ZH>not</> changeable. This is not permitted.

System Response

INCLUDE ISU_VERARB OBJECT DOKU ID TX

How to fix this error?

You must correct the implementation of BAdI ISU_EDM_BILL_CHECK.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.