Bindings can no longer be deleted


I’m running openhab 3.3 in Docker on a Synology DS918+.
A few weeks ago I had a long power outage. It then lasted so long that the UPS could no longer help.
Only yesterday I noticed that the installed bindings can no longer be deleted. On the other hand, newly installed bindings can be deleted immediately.
Is there a way to delete the bindings that have been installed for a long time?
Thank you in advance.