Gluster users - Jul 2017 - Upgrade / Downgrade package glusterfs-server

Hi, 
I upgrade glusterfs-server package on 1 serv from 3.7.6 to 3.10.3.
I have some questions :
 - Is it possible to peer probe some servers with different version?
 - I'm trying to downgrade from 3.10.3 to 3.7.6 and now I get an error when
I type "gluster" in my terminal : gluster: Symbol `gf_fop_list'
has different size in shared object, consider re-linking

Someone can help me to solve it?


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