[Python] How to clone a SQLAlchemy object with new primary key

I want to clone a SQLAlchemy object:

I tried:

product_obj = products.all()[0] #here products is service name

product_obj.product_uid = 'soemthing' #here product_uid is the pk of product model

products.save(product_obj)


but it just updates the old object.

Here is the code of products.save function:

class Service(object):

__model__ = None

def save(self, model):
self._isinstance(model)
db.session.add(model)
db.session.commit()
return model

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