how to solve this transaction error in mlab? [MongoError: Transaction numbers are … support document-level locking]

Question

I\'m trying to do a simple transaction using mongoose. It worked totally fine on MongoDB Atlas, but in mlab I got such an error: Mon

Answer 1

mlab.com runs mongodb 3.6, while the newest is 4.2.x and tools, db connectors, etc., want to use 4.x features.

In short, mlab.com is outdated.