Both DEVONthink and the CloudStation software seem to synchronize this folder and this seems to cause conflicts. To fix this please try this:
- Disable the sync location on both computers in Preferences > Sync
- Now clean the sync location via the contextual menu (again in the preferences)
- Disable the sync location’s option to synchronize the content of indexed items on both computers
- Enable the sync location on the first computer, upload the database(s) again
- Enable the sync location on the second computer
This should fix the issue but the indexed contents won’t be downloadable on iOS anymore. But if you use also DEVONthink To Go and need these contents then try disabling the sync to your Synology. In that case only DEVONthink will update the ~/CloudStation folder on both computers.