excel - one drive issue?

[Glaucus]

This happened once before and I had to change the file name and re upload.
There must be a proper way to rectify this.

Upload failed, someone updated the server copy and it's not possible to upload changes now

If I press keep my version, I can't upload it.
If I press keep server version, it undoes the changes and I still can't upload.

What causes this and is there a fix? Or do I really have to change file name, delete old file, then change the file name back.

 

[Glaucus]

It's not, it's just for me.
Open and save on tablet.
Just view and never save on phone.

 

[Glaucus]

Thanks, that's pretty darn rubbish. Can't see nay obvious settings.
Wonder if the wp10 preview in Feb will solve the issue. although it only happens once in a while.