Cannot assign some of the selected plants to reference plant &1

What causes this issue?

Custom check rules prevent the assignment of some of the selected
plants to reference plant &V1&.

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?

See application log for details.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.