Upgrade 13 to 14. Need brandnew ES cluster ?

[chizenjp]

I’ll upgrade FESS 13 to 14.

Now, is ver14 can rolling update from 13 ?
Or need brandnew ES 8.x cluster ?

[shinsuke]

Fess 14.2 works with Elasticsearch 7, 8 and OpenSearch 1, 2.
For data migration, please run it on Upgrade page.