!Friendica Support

I tried to use the avatar cache to file feature. After seeing that this didn't make any sense for me, I wanted to revert to the former state. (Storing in database/photo/storage)

Unfortunately, this ended up in a real disaster, as all (!) contact records still point to an avatar subdirectory that no longer exists.

Interestingly, some contacts could refresh their avatar, but all the others were not found.
How can I enforce the refreshing of all contacts, to obtain the correct avatars back?