I recently installed Kubuntu 17.04 on a fresh computer.

I moved my ~/Pictures from my earlier disk to the new one. I also copied the digikam databases in ~/Pictures/digikam-data, digikam* in ~/.config and ~/.local.

When I start digikam now, it complains that:

the collection Pictures (Folder "/user/Pictures" on the volume with the ID "xx..99..xx..99..") is currently not available.

It gives me an option to take no action or mark the collection as on a removable device.

When I take no action, I can see all my pics with all the tags, etc.

How do I get rid of this error/ warning?