Name Conflict in Excel

We are using Libreoffice on a stand alone computer but when we open the file again after using Libreoffice in MS Excel we are getting a Name Conflict error (Name cannot be the same as built in name). It’s typing up the file and we can’t get rid of it. What can we do?

I believe it’s tdf#112571 which is resolved in 6.0, and in 5.4.4. You didn’t mention your version, though.