i'm trying to deploy the ZCM 11.2.1 update on my ZCM Windows 2008 R2 servers. But i get the message:

The Update for ZENworks 11 SP2 (11.2.1)
update requires the following update(s) to be downloaded and authorized before it can be deployed:
Update for ZENworks (11 SP2)

I'm sure i allready have the SP2 update installed. But it was manually installed. The "Update for ZENworks (11 SP2)" was visible on the Available System Updates page, but i deleted the update because it was already installed manually.

Is there a way to install the 11.2.1 update anyway?

Kind regards,