Can not open or repair Photos Library

Leonie, that sounds excellent. Specially when I tried to do it, and I got this warning: "MBP>08/17.photoslibrary” can’t be renamed right now because another operation is in progress, such as moving or copying an item or emptying the Trash."

I had the file on an external HD, and had moved it back to MBA Picture's folder. and same thing happened when tried to rename each. I had nothing going on with either MBP library. but I emptied trash. made sure no photos open. Same warning.

Should I try a restart?

Mac OS Extended (Journaled). A LaCie 1T portable that I've used for 3 or 4 years to store photos, photo libraries, music and audiobooks when ran out of storage on MBP. my current MBA M1 is 2T. So, I'm slowly moving things back to MBA. that's why trying to merge Photos Libraries.

in order, will try restart; then safe mode. No iCloud. very bad luck syncing with iCloud. doubled Contacts and tripled-quadrupled Calendar. I am also in area with very bad connection, less than 1 Mbps.

The restart did it. changed name replacing ">" and "-". And changes held, and then allowed me to open the Photo Library. Now that this hiccup is resolved I can move onto merging my 2 Photo Libraries. Think I'll start a new post asking for advice.

Thanks folks.