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1. Describe your incident:
I am trying to upgrade a graylog cluster from elasticsearch to opensearch 2.9.0
2. Describe your environment:
opensearch 2.9.0
- 
OS Information:
CentOS 7 - 
Package Version:
graylog-server-4.2.13-1.noarch - 
Service logs, configurations, and environment variables:
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ERROR: Unsupported Elasticsearch version: 2.0.0
Please see the following link(s) to help you with this error:
Need further help?
- Official documentation: http://docs.graylog.org/
 - Community support: Graylog Community
 - Commercial support: Graylog: Industry Leading Log Management & SIEM
 
Terminating. ![]()
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3. What steps have you already taken to try and solve the problem?
I upgraded graylog from 4.2 to 5.1.
I pointed to a brand new opensearch cluster (I’m okay with it deleting old indexes that are not found).
4. How can the community help?
Is this a supported version of opensearch?  Is it too new?
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