Error on Publish: "Cannot complete this action. The URL 'Pages/homepage.aspx' is invalid. It may refer to a nonexistent file or folder, or refer to a valid file or folder that is not in the current Web.

I'm trying to publish a page after making some edits and getting the error, "Cannot complete this action. The URL 'Pages/Homepage_copy(1).aspx' is invalid.
It may refer to a nonexistent file or folder, or refer to a valid file or folder
that is not in the current Web." Not sure what to make of this. I'm able to open the page, check the page out, make edits, but unable to publish. Any ideas? Thanks, Scott