Record type & is not assigned to an activity

What causes this issue?

When you maintain the costing data for a work center, you can assign a
record type class to each activity. The confirmation entered using
record type &V1& belongs to the record type class &V2&. However, this
record type class is not defined in work center &V3&.

How to fix this error?

Check the record type classes in your work centers.

Error message extract from SAP system. Copyright SAP SE.