Diagnosis
The asset line items belonging to this transaction were alreadyreversed or are themselves reversal postings. In either case, thesystem does not allow another reversal. Reversed documents and thereversal documents for them are automatically marked as such, andyou cannot process them further.

Procedure
Check your choice of document. If you really need to reverse thisdocument, then you have to manually post a document with reversedpositive/negative signs from the original posting (back out theposting) rather than posting a reversal.