Only when I first use moviebase can I sync trakt normally. But if I add history in trakt later, it cannot be synced to moviebase. For example, if I have watched two episodes in trakt history, there is no option to sync in moviebase. I tried clicking the refresh button but it didn’t work.
It can happen with some shows
“TV shows might not be displayed on the progress page. In most cases, Moviebase couldn’t fetch TV shows through the Trakt synchronization.
This reason is that Trakt and Moviebase use different data sources for TV shows. Trakt obtains the data mainly from TVDB, whereas Moviebase gets the content from TMDB. Both platforms could have missing or wrong IDs for a successful mapping.
How you can fix it by yourself is written here.”