Getting Error in UpdateMany

MongoDB Enterprise > db.movieDetails.updateMany({ rated:null},{$unset: {rated:""}})
2019-05-06T01:08:33.484+0530 E QUERY [js] WriteCommandError: not authorized on mflix to execute command { update: “mo
vieDetails”, ordered: true, lsid: { id: UUID(“7058cefe-6066-43f1-8072-6ee12d739144”) }, $clusterTime: { clusterTime: Tim
estamp(1557085006, 1), signature: { hash: BinData(0, C9D3C6DA19ACF3695899376D8745E606853A114B), keyId: 66276721216045711
37 } }, $db: “mflix” } :

Looks like you connected to wrong db-mflix
Please double check