This is weird, the command is valid. >> usually mean that the shell expecting something. Seems you may pressed the Shift-Enter?
Please try to press Enter in the >> prompt
This is a warning about the possibility to have a crashing service if the new location wouldn’t be available.
I got the output from this command but it will not allow me to post the result here.
You may copy only the last few lines and then you should be able to post them.