Can't join cluster after changing node role

Hi,

I had cluster with 1 master + 2 data hot + 1 data content.

After changing node role of data hot node to data_hot, data_content and performing restart, the node is not joining the cluster due:

master not discovered yet: have discovered

When I reverting back to data_hot it is joining properly.

How can I add data_content role to the data_hot role?