good morning, I have elasticsearch 7.17. I noticed that if I have a mapping in an existing index and then i use PUT mapping, it doesn’t replace the mapping with the new one as I would expect, but simply updates it with the new keys. You can find below a way to reproduce the error. I would expect th…

PUT mapping doesn't actually replace the mapping but only "updates" it with new fields

Christian_Dahlqvist (Christian Dahlqvist) August 21, 2025, 11:04am 2

You can not change or remove existing mappings in an index in Elasticsearch, only add new ones. If you do need to remove something you will need to create a new index with the correct mapping and reindex the data.

1 Like

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