Cisco TAC reports this is normal behavior and Global Correlation updates are attempted every five minutes.  The error messages above are cosmetic - according to the TAC.  However - two defects are currently filed related to them and will be addressed...

I upgraded mine yesterday and am seeing these messages too - once per hour.  My sensor is setup to check for signature updates every six hours - so it's not that.  I also thought it might be related to the Global Correlation updates -  but one occurr...