"The library “Photos Library.photoslibrary” is in use by another program."

Hi! I accidentally deleted the Photos Library from the Pictures folder and naturally, the Photos app wouldn't open it. I immediately moved it from the trash back into the default Pictures folder but now I'm getting the following message:

I tried repairing it but it didn't help. I'm running Monterey 12.6.1 on Macbook Pro 2016 TB.