If I understand correctly, you want code that will allow you to have 2 schedules with the same number?
You can just remove the code that checks for existing schedules
admin/modules/Operations/Operations.php around line 903
# Check if the schedule exists
$sched = SchedulesData::getScheduleByFlight($this->post->code, $this->post->flightnum);
if(is_object($sched))
{
$this->set('message', 'This schedule already exists!');
$this->render('core_error.tpl');
return;
}
change to
# Check if the schedule exists
/*$sched = SchedulesData::getScheduleByFlight($this->post->code, $this->post->flightnum);
if(is_object($sched))
{
$this->set('message', 'This schedule already exists!');
$this->render('core_error.tpl');
return;
}
*/
I haven't tried it but it should work When adding schedules it will not verify any more.
Edit: Just noticed that there is actually no verification in place when editing schedules, so if you set it up like 100A, and go to edit it to 100 afterwards, it will allow you.