Hi Sean,
Thanks for the response...
finally manage to clear that error...
The issue turns out to be that the PM00300 was once backup (copied) to another table PM00300_DDMMYYYY
After the copy, the index and primary key of PM00300 was changed....
so i deleted the PM00300 and rename the one with the DDMMYYYY since it has the correct indexes and primary keys...
upgrade successful after that.
Thanks all.
Ben