problem in different format representation of date fields and other custom fields.

date: custom_field_X_day
custom_field_X_month
custom_field_X_year

other: custom_field_X

problem code:
bug_update.php

line 126:
if ( $tdef['require' . $t_custom_status_label] && !gpc_isset( "customfield$t_id" ) ) {

line 131:
if ( !gpc_isset( "customfield$t_id" ) ) {
continue;
}