A structural framing element is attached to a wall whose Structural Usage is set to Non-bearing.
This means that you have used a structural element such as a beam and it is attaching to a wall whose structural usage is set to Non-bearing. The following table lists the automatic Structural Usage settings for beams, based upon the elements in which they are being connected. There are a couple of different methods to correct this problem, each with pros and cons. The method used would be dictated by a number of factors, including determining if the structural elements(s) are truly structural elements or some type of faux treatment.
#1: Change the Structural Usage of the Wall from Non-bearing to Bearing by selecting the wall and bringing up the Element Properties dialog and changing the Structural Usage to Non-bearing. One of the downsides to this is if you are working with a structural engineer that using Revit Structure this wall will appear as a Bearing wall. If you are working with a structural engineer using Revit Structure, this would NOT be the appropriate method.
If the elements that have been modeled are not being used as structural elements, but being used as some sort of faux treatment, then consideration should be given to remodeling the framing using a non-structural elements.