Update program: I/O error &; function &, RC= &, key &

What causes this issue?

Part of the data that you want to save already exists in the database.

System Response

INCLUDE 'VERBUCHUNG' OBJECT DOKU ID TX LANGUAGE E

How to fix this error?

INCLUDE 'SYSTEMVERWALTER' OBJECT DOKU ID TX LANGUAGE E

Error message extract from SAP system. Copyright SAP SE.