Cannot create a file when that file already exists. (0x800700B7) backing up

When I setup a windows backup i get this error Cannot create a file when that file already exists. (0x800700B7)
Here is the screenshot
Configure Backup Send Feedback
The specified network location cannot be used
Verify the path points to a correct network location and that the supplied credentials can be used for write access to the folder.
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Cannot create a file when that file already exists. (0x800700B7)
Thanks
