Row inserted into PS_VNDR_BANK_ACCT with every save in component

Hello all,

Whenever a user add a new vendor or update a field in vendor using vendor pages, SaveEdit inserts a blank row (only key fields populated) into PS_VNDR_BANK_ACCT table. This cause an issue, if another update made to the same vendor or someone try to approve the same vendor on same day. It gives error saying "Data being added conflicts with existing data (18,2). I get the traces and I can see "COM Stmt=INSERT INTO PS_VNDR_BANK_ACCT" statement. but I am not able to find this statement anywhere in peoplecode.
How can I find and disable this Insert statement.