How To add new AOS instace on cluster load balancing

i have aos live one,

and I installed 3 new AOS which will be used as follows.
1 AOS as LoadBalance and Active AOS
1 AOS as Active AOS
1 AOS as Batch Server

I have created a cluster but can't add AOS server, a message appears "The Application Object Server cannot be marked as a Load Balancer while a member of the 'Non Load Balanced AOS Instance"

how to solve this