This is a value that is being retired and is currently only kept for legacy purposes. If you have queries that are based on this value, rewrite them to make use of the Product Version (Agent) value, which is the value that will be used in future versions of ePO.
I have ePO 4.5 with patch 2 (build 919). Installed MA 4.5 patch 2 (188.8.131.529) (with new extension 184.108.40.206)
All agents show: McAfee Agent (Deprecated).