xfce background change from command line 22.04

[Jerry Geis]

I am running this:
xfconf-query -c xfce4-desktop \
-p /backdrop/screen0/monitor1/workspace0/last-image \
-s /home/myuser/black.jpg

and I get this:

Property /backdrop/screen0/monitor1/workspace0/last-image dos not exist.

how do I change from the command line the background image ?

Thanks

jerry
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