MongoDB刪除文檔報錯？

> db.col.deleteOne({"title" : "MongoDB 教程-04"})
2020-06-21T20:59:53.353-0700 E QUERY    TypeError: Property 'deleteOne' of object bes.col is not a function
    at (shell):1:8
>

> db
bes
> show collections
bes01
col
mycol
system.indexes