Excel on ipad not syncing with W10pc

[kozz]

Excel on my ipad stopped syncing Excel on W10 pc. It was working a few days ago. I started to get messages that said " could not upload files because file were written by another". Now that message has disappeared and i can't duplicate so it will reappear so I can get an exact copy of message. Also, now the ipad does not add to an existing pivot table when I enter data in the ipad. Please help. Thanks

[kozz]

I forgot to add that I am using OneDrive between ipad and pc