Agent Logs full of strange entries

Hello Folks,

I'm currently investigating a patchamanagement issue on some client machines.

Unfortunatley the agent log is spammed with these entries:

"27.03.2014 12:31:50","CTaskAgentBase::ProcessLocalTaskInstanceList(): local task instance [00340849-c03f-45b1-8bab-a54f5840e77e] is already active, skipping.","Client Task Agent","client task agent.dll","3968","Informational"

Does anybody have an idea what this means? There are exactly five entries for several differen GUIDs and the all re-occurr all at the same second about every 30 minutes.

Thanks in advance!