Failure to upgrade Backup Exec 2012 agent

Hi All,

BE 12 agent was installed, I have planned to upgrade BE 2012 agent.

Previous time somebody told me no need to uninstall BE 12 agent and possible to upgrade in by push install directly.

I have tried but failure.....

"Another version of the Backup Exec Remote Agent for Windows Systems is installed on this computer. Uninstall the Remote Agent before continuing with the installation."

So I must uninstall it ?? Or anyway to upgrade it directly ??

Thanks