The process exits when a duplicate _id is inserted

[xjiaqing]

logstash-output-mongodb plugin version: 3.1.6
logstash version: 7.6.2
mongodb server version: 4.0.9

When I am inserting data, if the specified _id conflicts, the process will exit. The exception information is as follows

logstash[16300]: warning: thread "Ruby-0-Thread-84: :1" terminated with exception (report_on_exception is true):
logstash[16300]: Mongo::Error::BulkWriteError: Mongo::Error::BulkWriteError: : E11000 duplicate key error collection: adx_requests_at_hour_11.request_logs_1 index: _id_ dup key: { : "1d2ad817737849978c21a7937859001a" } (11000)
logstash[16300]: validate! at /usr/local/logstash/vendor/bundle/jruby/2.5.0/gems/mongo-2.11.4/lib/mongo/bulk_write/result.rb:184
logstash[16300]: result at /usr/local/logstash/vendor/bundle/jruby/2.5.0/gems/mongo-2.11.4/lib/mongo/bulk_write/result_combiner.rb:83
logstash[16300]: execute at /usr/local/logstash/vendor/bundle/jruby/2.5.0/gems/mongo-2.11.4/lib/mongo/bulk_write.rb:87
logstash[16300]: bulk_write at /usr/local/logstash/vendor/bundle/jruby/2.5.0/gems/mongo-2.11.4/lib/mongo/collection.rb:591
logstash[16300]: insert_many at /usr/local/logstash/vendor/bundle/jruby/2.5.0/gems/mongo-2.11.4/lib/mongo/collection.rb:568
logstash[16300]: register at /usr/local/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-output-mongodb-3.1.6/lib/logstash/outputs/mongodb.rb:68
logstash[16300]: each at org/jruby/RubyHash.java:1428
logstash[16300]: register at /usr/local/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-output-mongodb-3.1.6/lib/logstash/outputs/mongodb.rb:66
logstash[16300]: synchronize at org/jruby/ext/thread/Mutex.java:164
logstash[16300]: register at /usr/local/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-output-mongodb-3.1.6/lib/logstash/outputs/mongodb.rb:65
logstash[16300]: [2021-01-14T11:56:30,580][FATAL][logstash.runner          ] An unexpected error occurred! {:error=>#<Mongo::Error::BulkWriteError: Mongo::Error::BulkWriteError: : E11000 duplicate key error collection: adx_requests_at_hour_11.request_logs_1 index: _id_ dup key: { : "1d2ad817737849978c21a7937859001a" } (11000)>, :backtrace=>["/usr/local/logstash/vendor/bundle/jruby/2.5.0/gems/mongo-2.11.4/lib/mongo/bulk_write/result.rb:184:in `validate!'", "/usr/local/logstash/vendor/bundle/jruby/2.5.0/gems/mongo-2.11.4/lib/mongo/bulk_write/result_combiner.rb:83:in `result'", "/usr/local/logstash/vendor/bundle/jruby/2.5.0/gems/mongo-2.11.4/lib/mongo/bulk_write.rb:87:in `execute'", "/usr/local/logstash/vendor/bundle/jruby/2.5.0/gems/mongo-2.11.4/lib/mongo/collection.rb:591:in `bulk_write'", "/usr/local/logstash/vendor/bundle/jruby/2.5.0/gems/mongo-2.11.4/lib/mongo/collection.rb:568:in `insert_many'", "/usr/local/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-output-mongodb-3.1.6/lib/logstash/outputs/mongodb.rb:68:in `block in register'", "org/jruby/RubyHash.java:1428:in `each'", "/usr/local/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-output-mongodb-3.1.6/lib/logstash/outputs/mongodb.rb:66:in `block in register'", "org/jruby/ext/thread/Mutex.java:164:in `synchronize'", "/usr/local/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-output-mongodb-3.1.6/lib/logstash/outputs/mongodb.rb:65:in `block in register'"]}
logstash[16300]: connecting to redis: logstash:filter:seller:60006, value: Nox
logstash[16300]: [2021-01-14T11:56:32,204][ERROR][org.logstash.Logstash    ] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit
systemd[1]: logstash@adx_request_tsv.service: main process exited, code=exited, status=1/FAILURE

my output conf

mongodb {
    bulk => true
    bulk_interval => 3
    bulk_size => 900
    
    uri => "mongodb://127.0.0.1:10050/adx_requests_at_hour_23"
    database => "adx_requests_at_hour_23"
    collection => "request_logs_%{mongo_i}"
    generateId => false
}

In case #10, I found that the problem has been solved, which makes me confused. Is there some config error?