577282' } MongoError: Unknown modifier: $pushAll
    at Function.MongoError.create (/var/mybot/node_modules/mongoose/node_modules/mongodb-core/lib/error.js:31:11)
    at toError (/var/mybot/node_modules/mongoose/node_modules/mongodb/lib/utils.js:114:22)
    at /var/mybot/node_modules/mongoose/node_modules/mongodb/lib/collection.js:1008:67
    at commandCallback (/var/mybot/node_modules/mongoose/node_modules/mongodb-core/lib/topologies/server.js:1194:9)
    at Callbacks.emit (/var/mybot/node_modules/mongoose/node_modules/mongodb-core/lib/topologies/server.js:119:3)
    at Connection.messageHandler (/var/mybot/node_modules/mongoose/node_modules/mongodb-core/lib/topologies/server.js:358:23)
    at Socket.<anonymous> (/var/mybot/node_modules/mongoose/node_modules/mongodb-core/lib/connection/connection.js:292:22)
    at Socket.emit (events.js:159:13)
    at addChunk (_stream_readable.js:265:12)
    at readableAddChunk (_stream_readable.js:252:11)
    at Socket.Readable.push (_stream_readable.js:209:10)
    at TCP.onread (net.js:608:20)
(node:23822) UnhandledPromiseRejectionWarning: MongoError: Unknown modifier: $pushAll
    at Function.MongoError.create (/var/mybot/node_modules/mongoose/node_modules/mongodb-core/lib/error.js:31:11)
    at toError (/var/mybot/node_modules/mongoose/node_modules/mongodb/lib/utils.js:114:22)
    at /var/mybot/node_modules/mongoose/node_modules/mongodb/lib/collection.js:1008:67
    at commandCallback (/var/mybot/node_modules/mongoose/node_modules/mongodb-core/lib/topologies/server.js:1194:9)
    at Callbacks.emit (/var/mybot/node_modules/mongoose/node_modules/mongodb-core/lib/topologies/server.js:119:3)
    at Connection.messageHandler (/var/mybot/node_modules/mongoose/node_modules/mongodb-core/lib/topologies/server.js:358:23)
    at Socket.<anonymous> (/var/mybot/node_modules/mongoose/node_modules/mongodb-core/lib/connection/connection.js:292:22)
    at Socket.emit (events.js:159:13)
    at addChunk (_stream_readable.js:265:12)
    at readableAddChunk (_stream_readable.js:252:11)
    at Socket.Readable.push (_stream_readable.js:209:10)
    at TCP.onread (net.js:608:20)
(node:23822) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:23822) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.