Hannah Montana 2x30: A Quandary
In the US, https://trakt.tv/shows/hannah-montana/seasons/2/episodes/30 never aired. It's not included on the DVD set of the show, and it's not available on the U.S. iTunes store or Amazon Video.
Ultimately, the episode was delayed for editing and aired under a new title: https://trakt.tv/shows/hannah-montana/seasons/3/episodes/24
I really doubt that The TVDB will remove it, but I brought it up in their episode removal thread just the same. https://forums.thetvdb.com/viewtopic.php?f=42&t=35384&p=127994#p127994
If they do remove it, that's the easy way. If they refuse, though, Trakt is going to keep bothering me that I have an incomplete season due to an episode I can't collect.
TVDB will need to update this before I can remove it from Trakt.