我正在尝试使用进行简单的交易mongoose。在上一切正常MongoDB Atlas，但出现mlab了这样的错误：MongoError: Transaction numbers are only allowed on storage engines that support document-level locking。我做了一些研究，但实际上并没有找到有关mlab和的任何资源document-level locking。有谁知道如何解决这个问题？
mongoose
MongoDB Atlas
mlab
MongoError: Transaction numbers are only allowed on storage engines that support document-level locking
document-level locking
mongoose mongodb node.js mlab
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