[web2py] contrib.populate and uuid

[niknok]

On Web2Py v 1.94.5: 

db.define_table('person',Field('person_uuid', notnull=True, 
default=uuid.uuid4(), writable=False, unique=True))

from gluon.contrib.populate import populate
populate(db.person, 50)


Calling contrib.populate generates an error: "IntegrityError: column
person_uuid is not unique"  because it doesn't create the necessary uuid
for each record it creates for said table. I tried it without the
'unique=True' parameter and records are generated but all the records
share the same uuid.