This fixes the Belgian salary package configuration for hospital insurance so the benefit is handled correctly. It helps ensure employee salary offers and related HR contract details reflect the proper insurance option.

Users now receive a clear error message when the system cannot find the required numbering sequence for new records. This prevents confusing record names and helps administrators quickly identify and fix missing sequence setup across affected business flows.

Purpose:
Display proper error message when sequence
not found.
Specification:
raise error instead of returning FALSE when sequence not found 

Task-1974068