ES 2 to 7.5 migration

Elastic Stack Elasticsearch
1

Hi,

I'm currently migrating from ES 2 to 7.5. Below query gives me results in the older version and no results/error in newer version when executed in Postman.

{"query":{"constant_score":{"filter":{"terms":{"templateId":["AVoFf3hiHdjqewpccNCY"]}}}}}

Should I reindex API to index all data from old to new instance? Any help is greatly appreciated; thanks!

2

@lhmzhou you should probably ask this question in the Elasticsearch section. It seems related to Elasticsearch itself, not to ECK.