My musecore song won’t save because it says a measure has the wrong time signature

So I was writing a piece for jazz combo, but when I tried to save it, it said that it couldn’t save because one measure was 29/8 when it was expected to be 7/4 (the song is in 7/4). I think this is because the drum set had a hi-hat, snare, and bass drum in it, using 3 voices, but I don’t know how to fix it without massively altering the drum part.