Fatal error: Uncaught MongoDB\Driver\Exception\BulkWriteException: E11000 duplicate key error collection: u28.quotations index: _id_ dup key: { _id: 1 } in /var/shared/vendor/mongodb/mongodb/src/Operation/InsertOne.php:134 Stack trace: #0 /var/shared/vendor/mongodb/mongodb/src/Operation/InsertOne.php(134): MongoDB\Driver\Server->executeBulkWrite() #1 /var/shared/vendor/mongodb/mongodb/src/Collection.php(931): MongoDB\Operation\InsertOne->execute() #2 /home/course/u28/public_html/examples_php_mongo/quotes.php(265): MongoDB\Collection->insertOne() #3 {main} thrown in /var/shared/vendor/mongodb/mongodb/src/Operation/InsertOne.php on line 134