Key signatures unable to delete

• May 25, 2021 - 06:44

I seem to be unable to delete the key signatures in measures 38 and 42 of the attached score, Mozart's Adagio from his Serenade No. 10 in B-flat major, K. 361 "Gran Partita."
I believe these key signatures may be interfering with the notes that follow.
Can someone tell me why these key signatures appear, and what I can do to remove them?

Attachment Size
3 Adagio MS3.mscz 52.41 KB


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