Hello Suresh,
Not sure if you can change the sequence, however you could enhance CO11N to default the personnel number when it is hit.
Please check below threads if helpful,
During Production Order Confirmation in CO11N, yield quantity is not getting displayed.
The Yield Quantity in CO11N | SCN
Also you mention that this issue is faced after you upgraded, did you test this in non upgraded system
? Did it work there ?
Did you check for multiple users, and different orders ?
Hope this helps.
Best Regards,
Ameya Beri