mongorestore "E11000 duplicate key error collection"

[phenomlab]

During the restore of a MongoDB based database, you may receive the error message

E11000 duplicate key error collection

This is because by default the mongorestore command does not drop existing collections before attempting to recover them, which results in the above error message as the collections already exist

As an example, the command of

sudo mongorestore -d sudonixdev /path/to/database/sudonix -u admin -p <password> --authenticationDatabase=admin

Would need to become

sudo mongorestore --drop -d sudonixdev /path/to/database/sudonix -u admin -p <password> --authenticationDatabase=admin

The addition of --drop allows the collections to be overwritten by the restore.