SAP Message CBIH219 - Syntax error in work area key &1; correct the entry

Diagnosis
The system checks new work area keys before saving them. The systemdetected an inconsistency in the key you entered.
INCLUDE EHS_NA_KEY_CHECK OBJECT DOKU ID TX

System Response
The system rejects the key.

Procedure
Correct the work area key. If necessary, contact your systemadministrator to find out the correct syntax for work area keys.