It is of course no good idea to delete a container that is used for production. But why not development-only containers? Or, at least, hide some of the containers? This does not hurt. It is now 2026, and this is not yet possible. Such a little improvement, not possible?

Thanks for sharing this. I get this error also now and then, however the advice "not storing too much data in Core Data" is not very helpful: I downloaded by Xcode the container. The packet contains among others AppData/Library/Application Support//Private.sqlite with a size of 2.3 MB. This is surely not "too much data". Maybe they mean the persistent history of the persistent store has too many entries, and maybe the problem is gone if this history is purged. Did you make any progress?