SAP Message AH860 - Volume correction factor procedure &1 not permiss. as replacement proc.

Diagnosis
As a replacement volume correction factor procedure,you can only use active volume correction factor procedures for whichthe fields thermal gas billing and billing class
match the original procedure.
In addition, the measured pressure and nominal load intervals must beequal to or greater than the corresponding interval in the originalprocedure. Moreover, you cannot choose the special procedureregister relationship ZZ since this is what is to bereplaced.