OPC tag not updating

I am using S+ operation 2.0.4. with redundent servers. I have 1 OPC data point from a kepware server that is not updaitng on the graphic on server1, but it does update on server2. The other data points from the same Kepware server are updating. If I view the point from the operatoring parameters the value is updating, but it does not update on the graphic.

This tag has been in the database for over a year and has worked in the past.