I test this command on a mimic cluster. I can set the args to luminous and back to jewel as well. I think the root cause you cannot set it back, is some client may set a flag which conflict with jewe when you set that option to luminous. So you are not permitted to set it to jewel again. I think you should find this client and deal with it. Zhenshi Zhou <deaderzzs@gmail.com> 于2020年5月14日周四 下午4:56写道：
The doc says "This subcommand will fail if any connected daemon or client is not compatible with the features offered by the given <version>". The command could be done if the client is disconnected, I guess.
<luuvuong91@gmail.com> 于2020年5月14日周四 下午4:50写道：
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