[Fixed]-Create a new model which have all fields of currently existing model

If your BookmarkPlayer needs the same data but in a different table, an abstract base model is the best way to go:

class BasePlayer(models.Model):
    name = models.CharField(max_length=100, null=True, blank=True)
    date_created = models.DateTimeField(auto_now_add=True)
    last_updated = models.DateTimeField(auto_now=True)
    hash = models.CharField(max_length=128, null=True, blank=True)
    bookmark_url = models.CharField(max_length=300, null=True, blank=True)

    class Meta:
        abstract = True

class Player(BasePlayer):
    """ player model """
    pass

class BookmarkPlayer(BasePlayer):
    """ bookmark player model """
    pass

This way, both Player and BookmarkPlayer inherit their fields from the BasePlayer model, but because BasePlayer is abstract, the models are completely decoupled.

Multi-table inheritance on the other hand would still save the fields in a single table, but add an extra table for the BookmarkPlayer with an implicit OneToOneField to the Player table.