SAP Message AH794 - Error in user exit EXIT_SAPLE20Q_001

Cause v1<(><)> A customer enhancement has caused an error: rate type &v1& has beeninserted in the EXIT_SAPLE20Q_001 user exit for F4 help for rate types.It is not permitted to add rate types to the user exit. System Response Processing is terminated. Procedure Check the user exit.