Deleting from kmmOnlineJobs leaves kmmSepaOrders in tact because there is no:
- ON DELETE relation between kmmSepaOrders and kmmOnlineJobs,
- foreign_keys is disabled on default on SQLite, which makes ON DELETE possible.
Leaving kmmSepaOrders in tact prevents saving new records to it, because there aren't overridden automatically and thus regarded as non unique, which fails the requirement of INSERT.
We can easily recreate kmmSepaOrders (with ON DELETE constraint) without taking its content into account, as it would be deleted anyways.