ERROR [NettyTransport] Error in Input [Beats/]

Hello guys,
I got a some messages in Overview sub-menu like this Notification condition [NO_MASTER] has been fixed.
Then i check into Graylog2 logs, there are so many errors
Fortunately, i found this post but i am not sure if this will help me
Should i update my Filebeat version in all instance ?
How do i checked Beat version of Graylog ?
My graylog version is Graylog v2.5.1

Thank you

Now i got Broken Pipe

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