DocEntry and DocNum changing automatically

Hi all,

I have created a table in which whenever i update the table the  DOCENTRY and DOCNUM are getting changed and hence i could not update the table.

"This entry in the table already exists" - ERROR Occurs.

I dont know why this DocEntry and DocNum gets changed automatically.

How to update the table???

Please help me solving this issue.

Regards,

Jananisuba S