The node name has one or more characters that are not supported on servers earlier than V7.1.1. The character is the at sign (@).
The server skips the specified node, but replication processing continues.
Check if the node name has the '@' (at sign) character. Node names with the '@' character are supported on server versions 7.1.1 and newer. Reissue the command specifying a different node name, or, rename the node name and reissue the command.