Adding 5.5 beta node to 5.1 cluster error: Attention: Unknown services: ["cbas"]

I want to add a 5.5 node running the analytics service, but I get the error when I click to join the cluster.

Attention: Unknown services: [“cbas”]

Hi @dtait,

Are you trying to add a 5.5 node to a 5.1 cluster? I don’t think that will generally work. But specifically, analytics (cbas=CouchBase Analytics Service=analytics) was not a service that was available in 5.1 (it was shipped as a separate add-on). So that’s why you’re getting that error.