trace back when submitting membership payment and no "pending" membership status is set

When submitting a membership payment, we get the traceback below. It is happening because this particular site doesn't have a membership status of the type pending. CiviCRM builds a NOT IN statement based on an array and it expects the status_id corresponding to Pending to be present. If it's not present it generates a statement along the lines of NOT IN (, 6) which throws a sql error.