Klojum Thank you for sending me in the right direction: "Debug log file please." Found
Code
2021-11-03 21:51:29.088 T:847 INFO <general>: Old database found - updating from version 116 to 119
2021-11-03 21:51:29.089 T:847 ERROR <general>: SQL: Can't create database for copy: 'kodi_video116' (1044)
2021-11-03 21:51:29.089 T:847 ERROR <general>: Unable to copy old database kodi_video116 to new version kodi_video119
and checked the privileges of the kodi user on the mariaDB and was found it had no rights to create new databases... changed that an everything works.
So after I've upgraded all my LibreELEC Pis to 10.x I can delete the kodi databases with lower numbers? Music60 and music72 and video107 and video116? That's about 120 MB total.
Thanks so much!