Link Django models together via GenericKey?

i have the following models:

class Team(models.Model):
    users = models.ManyToManyField("User")
    
class User(AbstractUser):
     ...
    
class Subscription(models.Model):
    team = models.ForeignKey("Team", on_delete=models.CASCADE)
    name = models.CharField(max_length=64)
    
class Package(models.Model):
    name = models.CharField(max_length=64) # packageA, packageB
    max_activation_number = models.PositiveIntegerField(default=1)
    
class Activation(models.Model):
    subscription = models.ForeignKey("Subscription", on_delete=models.CASCADE)
    package = models.ForeignKey("Package", on_delete=models.CASCADE)
    created = models.DatetimeField()
    
class PackageA(models.Model):
    ... 
    
    
class PackageB(models.Model):
    ... 
    

A team has one subscription and it can activate one or more package and the same package could be activated more than one time. (number of times specified with "max_ativation_number")

Example:

A team has a subscription called Suite and the available packages are: EmailAccount and Calendar The team choose to activate 3 EmailAccount and 2 Calendar (packages are not tied to each other)

For that reason the team could activate the same package more times.

For every activation i need to create a new instance on PackageA or PackageB (it depends on the choice a team made) and then i should "link" to that instance somehow.

Should i use GenericKey field inside Activation model? I not only need the name of the chosen package but I also need to figure out which instance.

from Link Django models together via GenericKey?