Uh, ok, this is gonna sound like a stupid question, but when did the pink sketch status go away?
Check out the help topic in the web help for "Error Message - Unsolvable Sketch".
Could SolidWorks please take a moment to get your message straight and then come back and tell users what you decide to do?
Is there any such status as "overdefined" anymore?
Unsolvable, conflicts, no solution found, invalid... geez, what, the terminology police went on vacation and someone had a field day?