MongoError: Unknown modifier: $pushAll
at Function.MongoError.create (E:\ecom\node_modules\mongodb-core\lib\error.js:31:11)
at toError (E:\ecom\node_modules\mongodb\lib\utils.js:139:22)
at E:\ecom\node_modules\mongodb\lib\collection.js:1059:67
at E:\ecom\node_modules\mongodb-core\lib\connection\pool.js:469:18
at _combinedTickCallback (internal/process/next_tick.js:131:7)
at process._tickCallback (internal/process/next_tick.js:180:9)
POST /product/572a35ce194328dc20bfb7c7 500 3099.572 ms - 665