Level Maps crash UE5 after moving the files in the content browser to a new folder

After setting up a scene, i worked on other versions and saved files incrementally as levelmap01, levelmap02 etc.
In the content browser, using the option to ‘move to here’.
I moved two files to the same folder . And when i tried to open those two files, UE5 just crashes?!
the first level map file has not been moved and opens, but the other two…with 2 days work are now not opening.

Q- how can I get the level maps to open again ?

thanks for any advice or help.

Unreal 5.3.2 Still the same problem.

Fixed via changing /Config/DefaultEngine.ini
From EditorStartupMap=/Game/PingPongMap.PingPongMap
To EditorStartupMap=/Game/Maps/PingPongMap.PingPongMap