How to avoid modify MST conffig cause VPC Type-1 inconsistency problem

[fly]

we add vlan into spanning tree mst configuration on two VPC n5k switches.

After I add vlan on n5k-1 mst region , n5k-2 VPC go into type-1 inconsistency status  and shutdown vpc port

I have a question , how can I avoid this situation when a add vlan into mst region configuration 

Thank you

Tom