Can I using two interfaces for HA ?

Hi guys !

I need your help! 

I need change HA port on our customer device, Now is HA using as 1.0 interface (access mode, just alloc interface on ha vlan)

I will change HA interface using as 5.0. but our customer want to "no interrupt" during this tast

so, I will alloc 5.0 interface to HA vlan and then delete 1.0 interface

Is there any problem?

thanks!