Problem/Motivation
When I update an existing opening, and change the dates, all non-date-machting opening instances get deleted - except if they have bookings. This leads to the IMHO unintuitive behavior, that an old, no longer valid opening instance still has bookable slots left.
I understand that we can't delete those opening instances due the existing bookings, but for me the expected behavior here is to disallow further bookings of the non-date-matching opening instance.
Steps to reproduce
E.g. I've a recurring opening next three mondays, 10:00 - 18:00, with 10 slots
3 opening instances will be generated
20 nov 2023, 10:00 - 18:00 --- 10 open slots left
27 nov 2023, 10:00 - 18:00 --- 10 open slots left
04 desc 2023, 10:00 - 18:00 --- 10 open slots left
Create a booking for 27 nov 2003, consuming 3 slots
list of opening instances is now
20 nov 2023, 10:00 - 18:00 --- 10 open slots left
27 nov 2023, 10:00 - 18:00 --- 7 open slots left
04 desc 2023, 10:00 - 18:00 --- 10 open slots left
Now change existing opening to next three mondays, 11:00 - 17:00, with 10 slots
list of opening instances is now
20 nov 2023, 11:00 - 17:00 --- 10 open slots left
27 nov 2023, 10:00 - 18:00 --- 7 open slots left <== these 7 slots are no longer valid
27 nov 2023, 11:00 - 17:00 --- 10 open slots left
04 desc 2023, 11:00 - 17:00 --- 10 open slots left
Proposed resolution
The slots on the no longer valid opening instance should be set to 0 to disallow further bookings of the invalid instance.