Moving from 6.7 to 7.0 & Doc Type Confusion

Hello,

I am looking to upgrade my cluster from 6.7 to 7.0

I have ~200 indexes each with a doc type associated to it.

/index_name/document_name
/index_name2/doctument_name2.
....

What happens to these document types after the upgrade? Are they accessible and just show a warning? Do they just go away? My concern is that I will do the update then somehow lock myself out of the indexes or blow something up. The data set is really large several TB, so when I make a mistake like that it takes a long time to clean up.

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