Drawings not pointing to new file when changing an assembly file name

I am working in an assembly and I have the option to rename a file by clicking the file name.  We have pdm, and  I have done that a few times lately, and when I go to open the drawing I get this...

Is there some trick to get the drawings to sync with the new name when you change it? 

Secondly how can I fix this, and get the drawing to let me point it to the file?

SolidworksDrawings And Detailing