A user on a team sharepoint who has contribute permissions is getting a 'read only' version of ONE of the files in a folder. All other users can open normally and edit. However, when this user selects this one specific file to open and then selects EDIT, it still opens in read only. Other excel files in this same folder open normally and the user can edit.
I have tried removing the user from the permissions group and re-adding, and also adding separately. No luck. Thoughts on what it could be?
(I did check the users office upload center for any pending or errors on file uploads, bot it was empty).