Elasticsearch upgrade 1.x to 2.x mapping error

I have indices that have "name.exact" or "album.album". I want to ugrade 1.7 to 2.4. I took snapsot and when I restore it : unable to upgrade the mappings for the index [metadatav4], reason: [Field name [album.album] cannot contain '.'. I should restore all the fields of all indices. How can I achieve this?

May be a split brain issue?

something went wrong

What exactly?

May be share the logs of all your nodes? Please format with </> icon.

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