在mongodb中保存第二条数据时报错E11000 duplicate key error collection: anomaly_monitoring.users index: name_1 dup key: { : null }

错误e11000重复键错误集合:anonymous _ monitoring.users索引:name _ 1dupkey: {:null}在mongodb中保存第二个数据时错误e11000重复键错误集合:anonymous _ monitoring.users索引:name _ 1dupkey: {:null}在mongodb中保存第二个数据时简介:{bulkwriteerror: e11000重复键错误集合:anonymous _ monitoring.users索引:name _ 1dup