I always keep Zammad up to date, but I didn’t realize that elastic search doesn’t also update it self. So now I have Zammad in lates Version 4.0.x but elasticsearch was on 5.6.16. I then updated elastic search to 7.13.2 but elasticsearch wont start. In the log file I can see:
java.lang.IllegalStateException: The index [zammad_zammad_production_ticket/q7t32r3wTC-P5-NJSh0giA] was created with version [5.6.16] but the minimum compatible version is [6.0.0-beta1]. It should be re-indexed in Elasticsearch 6.x before upgrading to 7.13.2.
How can I do that, so that elastic search will start again?
Thanks in advance!