The following pages have deprecation warning which should be addressed and updated with the appropriate method.

https://docs.mongodb.com/manual/reference/method/Date | DeprecationWarning: Collection.update() is deprecated.
https://docs.mongodb.com/manual/reference/method/db.getSiblingDB | DeprecationWarning: Collection.count() is deprecated.
https://docs.mongodb.com/manual/reference/operator/query/gt | DeprecationWarning: Collection.update() is deprecated.
https://docs.mongodb.com/manual/reference/operator/query/lte | DeprecationWarning: Collection.update() is deprecated.
https://docs.mongodb.com/manual/core/schema-validation | DeprecationWarning: Collection.update() is deprecated
https://docs.mongodb.com/manual/tutorial/expire-data | DeprecationWarning: Collection.insert() is deprecated
https://docs.mongodb.com/manual/tutorial/update-documents-with-aggrega… | DeprecationWarning: Collection.insert() is deprecated.
https://docs.mongodb.com/manual/reference/operator/query/nin | DeprecationWarning: Collection.update() is deprecated.
https://docs.mongodb.com/manual/reference/method/db/getLastError | DeprecationWarning: Database.getLastError() is deprecated
https://docs.mongodb.com/manual/tutorial/perform-incremental-map-reduce | DeprecationWarning: Collection.mapReduce() is deprecated.