E11000 duplicate key error collection

[vealjoshua]

E11000 duplicate key error collection: 5c70c028c56c980b9d1eeb65_freecog.sessions index: _id_ dup key: { : "fWOQ_VluVcC2ps4G28GnCpqtF3khaS3W" } at /var/app/current/node_modules/connect-mongodb-session/index.js:226:21 at err (/var/app/current/node_modules/connect-mongodb-session/node_modules/mongodb/lib/utils.js:411:14) at session.endSession (/var/app/current/node_modules/connect-mongodb-session/node_modules/mongodb/lib/utils.js:397:27) at ClientSession.endSession (/var/app/current/node_modules/mongodb-core/lib/sessions.js:134:41) at executeCallback (/var/app/current/node_modules/connect-mongodb-session/node_modules/mongodb/lib/utils.js:395:17) at updateCallback (/var/app/current/node_modules/connect-mongodb-session/node_modules/mongodb/lib/operations/collection_ops.js:1402:19) at updateDocuments (/var/app/current/node_modules/connect-mongodb-session/node_modules/mongodb/lib/operations/collection_ops.js:1502:62) at handleCallback (/var/app/current/node_modules/connect-mongodb-session/node_modules/mongodb/lib/utils.js:128:55) at coll.s.topology.update (/var/app/current/node_modules/connect-mongodb-session/node_modules/mongodb/lib/operations/collection_ops.js:1465:14) at handler (/var/app/current/node_modules/mongodb-core/lib/topologies/replset.js:1155:22)

I'm getting this error when trying to log in for my user twice.