Two Robot Versions visible for the Machine in Orchestrator

Hi all,
After an update of the Orchestrator (from 19.10 to 20.10.2) and update of robot VM (from 19.10 to 20.10.2) I can see a strange behavior. The robot is added as classic robot to the Orchestrator, and under Tenant/Machines, the Orchestrator shows that there are two versions installed on the VM. However this is not possible, because the 20.4.1 was never installed on the VM. How can this happen? What could be the reason? What to do in this case?
Original installation happened with UiPathStudio.msi and the update also with the UiPathStudio.msi. License on the VM is unattended license.

Thanks in advance!

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