SAP Message VV304 - Group '&' is not defined in the availability check

Diagnosis
The availability check or transfer of requirements was called withinthe sales and distribution processing framework with checking groupV1. this is not maintained in the system.

System Response
The system terminates processing, because processing can no longerbe completed consistently.

Procedure
Either maintain the master data (SD-Plant data) of the material, orensure that the corresponding functions are no longer called.