Qualification assignment is not allowed for attendee type &

What causes this issue?

There is no valid entry for the time constraint or the allowed
relationship '032' (fulfills / is fulfilled by) for attendee type &V1&
or the object type Qualification.

System Response

Selection of the qualification assignment is not possible for the
attendee type &V1&.

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.