Teeth surrounding canine teeth moving and hurting.

I am wearing clear aligners. Last night I switched to my 9th tray (out of 20). My treatment plan says that my 9th tray should only be moving my canines. I'm used to aching teeth the first few days after switching to a new tray, but this morning when I woke up, I noticed that my front teeth and teeth surrounding my canines are tender and my canines actually don't hurt at all despite them supposedly being the only ones being moved. Any idea what's going on or why this is?

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