[BetterRed]

When you change the name of a library Calibre can't adjust the calibre:// URL's that point to books in that library because it doesn't know where they are used. They could be in the link field of a column in another library, on a web page, in a note-taking app such as Evernote, in a shortcut on your desktop - or all of the above.

Sounds like you want to do a bulk change to the Link field values in the Tag column of one of your libraries. The Link field for Tags is in the database table 'tags', I don't think calibre provides a way to do a bulk S&R on that data. You can do it using a database utility such as DB Browser or SQLite Studio. If you want to take that route, take a subset copy of the relevant libraries, and experiment with them - don't change a library database while calibre is running.

Meantime, I suggest you change the library name back to what it was.

BR