Moving digikam from one computer to the other

DK 8.8.0 appimage

I have copied:
~/ .config/digikamrc
~/ .config/digikam_systemrc

and the dbs

~/db/digikam4.db
~/db/recognition.db
~/db/similarity.db
~/db/thumbnails-digikam.db

the photos are on the same external usb drive plugged in the other
computer.

But digikam doesn't recognize the dbs and starts the indexing from
the photo album.

Which config am I missing?

Thanks
-- 
sknahT

vyS