[Karellen]

In my case this concerns media scraped years ago. You will see this in the log file (debug verbosity) with lines like this:

Code:

get_watched_xbmc: tv show "Rick and Morty" has no tvdb-number in database. tvshowid=217. Unique IDs: ['unknown']. Try rescraping.
get_watched_xbmc: Movie The Green Hornet (2011) has no imdb-number in database. movieid=1972. IDs are ['unknown']. Try rescraping
get_watched_xbmc: tvshow 217 has no tvdb-number. Skipping episode id 17083 (Rick and Morty S01E01)

Yes, this is a problem. Many users don't realise the importance of the UniqueID in the correct format. So they go ahead and create nfo files with barely any tags, no UniqueID's, or incorrectly formatted Id's, then wonder why their addons don't work, and their library does not look as "nice" as other pictures they see on the web. But there are also media managers out there that don't create the correct UniqueID's also. They are still using the old <id> or not including the type=""

Any chance you could include User Rating in the data that your addon saves to backup?