Upgrade comparison using Modification Assistant is complete

What causes this issue?

The upgrade adjustment for &V1& using the Modification Assistant is
complete. The changes have been saved.
There are no further discrepancies. The object can be processed again
using the appropriate tool.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.