error: Cannot create record. The Record already exists.

Problem :
Our client recently facing this error during creating any journal lines (LedgerJournalTrans) .

we did restart aos, full CIL, and any standard technical troubleshoot hoping it was a cache error or something like that. And we tried drop the table and inject it with the copied data. After doing some checking on table SystemSequences with table id 212 (ledgerJournalTrans), its nextVal RecId value record is already exist on that table.

reference for RecId on AX :

solution :
1. Stop the AOS
2. get the max recid from the table on SQL with:

select max(recId) from ledgerjournaltrans;

3. update the systemSequences table on SQL with:

update SYSTEMSEQUENCES set NEXTVAL = 'MAXRECID from table' where tabid= 'tableID'

4. restart AOS and run AX

Conclusion :
they did not doing some sort of AX Version upgrade that will impact whole data
and the main problem why the AX stored procedure on SQL returning next RecId value for the next record that already exist on the table remains a mystery.

Reference :