Safari not saving bookmarks

Safari bookmarks are visually saved to bookmarks menu, after restart Safari bookmarks are reverted to version dating december 2023.

Any ideas why Safari reverts bookmarks back every time it restarts?

Where are the bookmarks stored: Library/Safari/Bookmarks.plist i guess?

Safari Version 17.5 (17618.2.12.111.5, 17618)

Mac OS Monterey 12.7.5 on Mac Pro (Late 2013)