We have a process of getting photos collected through Collector so that we can upload them to our internal Sharepoint site.  In that process we use a "Join Field" to join the Point Feature Class and the Attach table by the GlobalID field.  I has always worked no problem, but lately it is giving me an error.

These files come from a File Geodatabase download from Arc GIS Online and then are copied with a "Feature Class to Feature Class" and a "Table to Table" tool.  So the file types should be easily recognizable by the model.  Any insight out there into this problem?