Apologies on that @phudinhha -- I usually separate out my indexes from downloadedTA/Apps and create my own app to contain all indexes so it didn't occur to me that this may happen. However, if your indexed data is being sent to separate indexers (i.e. your search head isn't an all in one), then the index is only gone from the search head but the data should still be on the indexer(s). You ought to be able to recreate the index on the search head and that will allow you to search against your indexed data on the indexers again.
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