Rolling back undefined fields

[yamila-fraiman]

Not sure what's happening but when I use fawn (viasave) to update a document overriding exiting values to undefined, it's restored to the original value. Transaction results are ok and can't see the deleted value but don't know where is restored.

Eg:

Before: {name: "MyName", description: "Hello"}
After: {name: "MyName"}

transaction.run({useMongoose: true}).then((results) => {
    //results[0] is {name: "MyName"} but if I query db is {name: "MyName", description: "Hello"}
});