I'm trying to upgrade a 5.4 cluster to 7.3.
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I first upgraded to 5.6.16 to get access to the Upgrade UI in Kibana
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That worked fine, and I was able to run the Reindex helper tasks and see the indices status change in the Cluster Upgrade view
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Then I installed 6.8 but Kibana gives an error on start-up of;
log [14:12:05.882] [error][status][plugin:spaces@6.8.0] Status changed from yellow to red - Index .kibana belongs to a version of Kibana that cannot be automatically migrated. Reset it or use the X-Pack upgrade assistant.
log [14:12:05.884] [fatal][root] { Error: Index .kibana belongs to a version of Kibana that cannot be automatically migrated. Reset it or use the X-Pack upgrade assistant.
Any ideas ?