Deleting Star Trek

I guess Tivo Roamio Plus does not like Star Trek. WGN has been showing the entire original series and I am recording. I have a 3TB HD with only 30% used. I noticed today that Tivo is deleting the newly recorded Star Trek recordings. WTF There are plenty of older shows that could be deleted, but no, Star Trek. I recovered them and spend half a hour changing them all to KUD.

I do not understand this - Tivo should not be deleting anything. I have lots of 1Ps, but all total, it would probably not fill up the drive.