Get some error messages after Graylog Update

Graylog Central (peer support)
1

After update Graylog 2.2 to 2.3 and Elastic from 2 to 5. I get some error messages like:

{"type":"mapper_parsing_exception","reason":"failed to parse","caused_by":{"type":"illegal_argument_exception","reason":"Can't parse [index] value [not_analyzed] for field [Bytes_grokfailure], expected [true] or [false]"}}
2

Try rotating the active write index (System/Indices/Index Set/Maintenance).

4

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