Prompted to save template changes for documents opened from ShareP

Hello,

I create agendas and meeting notes using a template that I created in MS
Word. Most of the documents created from these templates are stored on
various SharePoint sites.

Whenever I open the documents from the SharePoint sites, I am prompted to
save changes to the template from which the document was created when closing
the document. This occurs whether I make changes to the document or not.

Any ideas why this happens and how to stop it? This does not occur when I
store the documents locally to my PC or to a network shared drive, only to
SharePoint sites.

Thanks,

Tom