How to duplicate a document

Hi Im having problem duplicating a document, which is I needed the most.
I already tried using deepcopy but it is not working as expected,

z=deepcopy(x)
z.container_type=RootModel.Item.QOUTATION
z.qoutation=q
z.save()

Now what just happened is it only insert the field which I personally change so the result became like this
{ "_id" : 22, "container_type" : "QOUTATION", "qoutation" : 14 }

It should have other information. Does deepcopy works well on this method?

But printing the copied data prints all the information, I just don't know why it is not saving the rest of information..

Sinse to_mongo returns the real data, is there a way to make this document inserted? like to_mongo().save()

No source file or test is identified. Start by reproducing the deepcopy and save behavior from the example, then inspect the document save and to_mongo entry points. Done means establishing whether duplicated documents preserve unchanged fields and documenting or testing the expected insertion behavior.