What is the ~lock.URLs.ods# on my desktop?

I have an Open Document Spreadsheet (.ods) file on my desktop.
About a week ago another icon poped up when I open the spreadsheet file.
It is a grayed out icon with the title, ~lock.URLs
I delete it but it comes back each time I open the URL file.

When opening a file LibreOffice creats a respective ~lock… file in the same folder to lock the file against a second attempt to open it. When the original file is closed the ~lock… file is deleted automatically. Mostly you may not see it. If it’s on the desktop, you will.

Thank you for straightening me out on this icon thing.