Message SAP WRF_AT160 - There is no valid message type in Customizing for message WRF_AT 104

Diagnosis No valid message type (warning or error) has been maintained for themessage WRF_AT 104 in Customizing. However, this is required. System Response INCLUDE ISR_STOP Procedure Contact the system administrator. Procedure for System Administration Message WRF_AT 104 is delivered with the message type 'Error'. You canmodify its message type in the Customizing activity "Properties ofSystem Messages" in allocation table environment.