Data inserting two times in a table when i click submit button

Hi Experts,

I had a problem, when i am inserting data in a table from a form at the first time when i click button it adds two times, afterwards it is adding one time only, the form and table are from same value node (table is collection cardinality : 1..n and selection cardinality is 0..n) i don't understand why it is happening here?

Regards,

Pradeep Kumar