Diagnosis
Line V2 has a parent V1, but there is no line V1 in document V3. Thedocument is inconsistent.

System Response
The system cannot process line V2.

Procedure for System Administration
It is possible that the aggregation in BAdI/LIME/COLLECTOR has been wrongly set. If youreset field LINE_ID in method CLEAR_FIELDS, it is a good idea to alsoreset the PARENT_ID.