Missing enough suitable candidates to create a replicated copy

[dm1]

I have a multi-site indexer cluster with 3 sites and 2 indexers in each site. RF and SF set to 3

RF = origin:1, total:3

SF = origin:1, total:3

However, I am getting numerous such errors

missing enough suitable candidates to create replicated copy in order to meeting replicaiton policy. Missing={site3:1}
missing enough suitable candidates to create replicated copy in order to meeting replicaiton policy. Missing={site2:1}
missing enough suitable candidates to create replicated copy in order to meeting replicaiton policy. Missing={site1:1}

 I am suspecting this might be due to incorrect RF/SF.

Can anyone please help confirm ?