[HeresJohnny]

I came across the same error, MariaDB 10.8.3 here. When setting an episode to "unwatched", the addon wants to reset the time of "lastPlayed" near the minimum supported value, in my case was [1970-01-01 01:00:00]. I am guessing that summertime or time zones in general are messing with the time conversion formula so it tries to reset the field to [1970-01-01 00:00:00] outside the supported value (minimum is [1970-01-01 00:00:01]). The proposed fix referenced above might or might not work but there is a "lazy" fix which in my tests makes the add-on work as expected. Simply set the database fields from TIMESTAMP to DATETIME type. Both datatypes use the same time format so no conversion or other database changes should be necessary and DATETIME can be any given value and thus doesn't trigger the error.