The “message” tag is not a tag, it’s the message of the PRIVMSG at the end of the example line:
@badges=;color=;display-name=;emotes=;id=;mod=;room-id=;subscriber=;tmi-sent-ts=;turbo=;user-id=;user-type= :!@.tmi.twitch.tv PRIVMSG # :
I believe “message” has been included in the table in error