SAP Message 5M330 - Day/period exemptions are not permitted for primary cards only

Diagnosis
You have tried to enter a period exemption or day exemption, eventhough the tax card in question is not a primary tax card.

System Response
The system displays an error message to indicate that the data you haveentered is inconsistent. You are required to solve this error.

Procedure
Either change the type of card, or delete the day or period exemption.