I have a 3-shard RS setup and recently ran mongodump. I'm testing a restore in a new environment and mongorestore is throwing many

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error: E11000 duplicate key error collection: jerome5.Example index: id dup key: { : ObjectId('4e649ee8e4b0a4d912587d16') }
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on the sharded collections. I know some of these have orphans (documents that appear on 2 shards) because I know my counts are off sometimes. Looks like mongodump is just merging the dumps of the 2 shards without resolving dupes or ignoring the orphans. Would --repair fix this? Maybe a warning in https://docs.mongodb.com/manual/reference/program/mongodump/ would be good?