i am facing this for the first time

i am trying to import opening balances for account receivable, however, i am getting this error

new row for relation "account_move_line" violates check constraint "account_move_line_check_accountable_required_fields" DETAIL: Failing row contains (1937, 741, 104, 2, 129, 100, null, 129, 1224, null, null, null, null, null, null, null, null, null, null, null, null, 10, 10, null, null, null, null, null, product, null, null, null, null, null, 19950.00, 0.00, 19950.00, 19950.00, null, null, null, 1.00, 0.00, null, null, 0.00, null, null, null, null, f, 2024-11-24 09:45:08.458987, 2024-11-24 09:45:08.458987, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null). at multiple rows

i am not sure what could be the reason. 

thanks in advance