Sharepoint Library in Microsoft Access issue

I have connected a sharepoint Library to my Access Database front end for storing documents. I can open the documents no problem from the Access front end, but if I change any value in the columns I have created in the SP library I get an error that tells me I must enter a value in the Name column.

The name column as it appears in the access database appears empty, and also locked so I cannot enter data.

But when I go to the sharepoint library in a browser and look up the name column I can see it has a value, and the value is the file itself.

Has anyone seen this error before? And is there a known workaround?