BP role category &1 is still in use and cannot be deleted

What causes this issue?

The BP role category &V1& is still assigned to at least one business
partner role in table TB003.
The deletion of the BP role category therefore results in
inconsistencies and possibly problems in the business partner
maintenance.

System Response

Error message.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.