SAP Message 30045 - Precondition for entry of wage type is that unit must be unit of time

Diagnosis
You have entered a wage type in the service master record. The systemtherefore assumes that the service is used for the description andconfirmation of internal (in-house) or external times.

Procedure
Check whether the specified unit of measure is a time-related unit andwhether or not non-time-related units of measure are allowed.