Version 7.1.1 Doesn't work mongoose 6.0.9 && mongo version 4.2

[OguzBey]

error to string

MongoServerError: E11000 duplicate key error collection: test_db.users index: email_1 dup key: { email: "[email protected]" }
at /api/node_modules/mongodb/lib/operations/insert.js:51:33
at /api/node_modules/mongodb/lib/cmap/connection_pool.js:272:25
at handleOperationResult (/api/node_modules/mongodb/lib/sdam/server.js:363:9)
at MessageStream.messageHandler (/api/node_modules/mongodb/lib/cmap/connection.js:479:9)
at MessageStream.emit (events.js:314:20)
at processIncomingData (/api/node_modules/mongodb/lib/cmap/message_stream.js:108:16)
at MessageStream._write (/api/node_modules/mongodb/lib/cmap/message_stream.js:28:9)
at writeOrBuffer (_stream_writable.js:352:12)
at MessageStream.Writable.write (_stream_writable.js:303:10)
at Socket.ondata (_stream_readable.js:714:22) {
index: 0,
code: 11000,
keyPattern: { email: 1 },
keyValue: { email: '[email protected]' }
}

[OguzBey]

link pull req #69