In Aria Operations when attempting to add a node back into cluster getting an error saying add failed because its still a part of the cluster.

Products

• VCF Operations/Automation (formerly VMware Aria Suite)

Issue/Introduction

After removing a node from Aria Operations cluster and attempting to add it back in, you may get an error stating the add failed because its already part of the cluster. 

Environment

Aria Operations 8.18

Cause

This by design of the product 

Resolution

For Aria Operations you may not re-add nodes that you already removed. If your environment requires more nodes, add new nodes instead as mentioned in product documentation Cluster and Node Maintenance.