@Mishetop Unfortunately, if this happened in a previous listening session, there isn't a way to go back and re-Thumb any tracks. However, the next time the track plays again on your station, make sure to give it a Thumbs up.
If you'd like to see this option made available moving forward, I recommend creating a new thread in our Ideas space. This will give others around the community a chance to upvote your idea if it is something they are interested in seeing as well.
I hope this helps explain.
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