TOPIC: !Repeating events issue

Hi!

VERY important issue, so please take a look!

Even if I don't change anything in the parent event and click 'Save' all the child event gets the different ID. All the records which are made for those child ID's are LOST.
Is it possible to keep the same ID of the repeating events after changing the parent?

It's not the problem with the event which has 10-15 repeats (say, once a month). I can manually change every child event, BUT if a have the event which repeat twice a week it's a headache to manually change every child event (maybe 100 times) in order not to lose the records made for some of them.

Also. Is it possible to protect the event from deleting if the record is made for this event.
Say, I had 100 repeating events
1
2
3
4
...
100

All the event passed and was archived. But I'd like to clean those which had no records and leave the events which had registrations (say, 2,3,43,50). Now I need to check all of them in order not to accidentally delete those which have registrations (delete event=delete all it's records). It would be very nice to have some auto-protection for the records which had registration (or auto-cleaning passed events which had no registrations)

Please help

Thanks