Error in converting a repetition document

What causes this issue?

Repetition documents are converted from the physical view to the
logical view when they are imported. When they are saved, the logical
view is converted back into the physical view. An error occurred during
this process.

System Response

Processing cannot be continued.

Procedure for System Administrators

INCLUDE NA_ISU_OSS OBJECT DOKU ID TX

Error message extract from SAP system. Copyright SAP SE.