Remove field from index mapping

I'm trying to upgrate elasticsearch from 1.x to 2.x and I found that I have some field name with dot so I deleted all the indexes type has contained that field with dot but still the index mapping contains those fields name has dot.

I'm looking for a way to delete those dot fields from index mapping objects.

Any ideas to get rid of this dilema.

You need to reindex. My advice is to reindex in 5.x or better 6.x

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