Replacing 2x2Gb port channel by a 2x4Gb port channel

We have 2 sites and in each fabric we've connected the MDS9222i switches to the 9222i over two 2Gb links in a portchannel.

Connections made between the 2 sites are using IVR with a transit VSAN.

We've experimented with 4Gb SFPs and connected mirror view ports of a couple of VNX2s on each side without using IVR. So the mirror view ports on each side are in the same VSAN without IVR / transit VSAN usage.

Now we would like to move all other arrays from the slow 2 x 2Gb port channel to the new 2 x 4Gb port channel. But there's 1 caveat: we also have a few older VNX1s that share the mirror view port with hosts, so we cannot simply put that port in the VSAN the port channel to the other location is in.

How can we make sure FC traffic that now flows over the 2 x 2Gb port portchannel to start flowing over the 2 x 4Gb portchannel?

In the picture I included the current config is using the green / brown / purple links. Hosts are in the green and purple VSANs. A few VNX2s are already using the red VSAN for mirror view and hosts are using different ports on the VNXs. The reason why we're mixing hosts and mirror view on the same ports in the green / purple config is that this customer didn't buy more ports.

So my question is this: can I reconfigure the IVR somehow so it stops using the brown transit VSAN and starts using the red VSAN for a transit?