Unable to vMotion between hosts

Hi there!

I'm trying to vMotion VMs between an old cluster (vsphere 5.5 / dvSwitchs 5.5) to another one (vsphere 6.5 / dvswitch 6.5).

I'm using vCSA 6.5 Flash mode.

It gives me the errors:

"Change the network and host of a virtual machine during vmotion is not supported on the "source" host"

"Current connected network interface "network adapter 1" cannot use network XXXXXXXXX becuase the destination vDS has a different version and or vendor than the source.."

Source vDS = Version 5.5 | ESXi host version 5.5

Destination vDS = 6.5| ESXi host version 6.5

I already have changed the vendor to VMware, Inc. with this KB in mind: https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2126851

Any clues?

Best regards