Problem when create a instance in database

Hello, I have a problem when I try to create something in database

Cannot assign "UUID('e84c8098-c240-48c2-91d9-1d266a0cd37e')": "Company.user_id" must be a "User" instance.

Here is my code

User model

class User(AbstractUser):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    email = models.EmailField(verbose_name='email address', max_length=255, unique=True)
    username = models.CharField(null=True, verbose_name='username', max_length=255)
    first_name = models.CharField(null=True, verbose_name='first name', max_length=255)
    last_name = models.CharField(null=True, verbose_name='last name', max_length=255)
    is_company_account = models.BooleanField(default=False)
    session_token = models.CharField(max_length=255)

    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)

    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = ['username']

    def __str__(self):
        return "{}".format(self.email)

Company model

class Company(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    name = models.CharField(verbose_name='company name', max_length=50, unique=True)
    company_location = models.CharField(verbose_name='company location', max_length=100)
    user_id = models.ForeignKey(User, on_delete=models.CASCADE)

    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)

    def __str__(self):
        return self.name

And ViewAPI

class CompanyAPIView(generics.GenericAPIView):
    serializer_class = CompanySerializer
    permission_classes = [IsAuthenticated]

    def post(self, request):
        name = request.data.get('name')
        company_location = request.data.get('company_location')
        user_id = request.user.id

        company_serializer = CompanySerializer()

        company = company_serializer.create({'name': name, 'company_location': company_location, 'user_id': user_id})
        company.save()

        return Response({'message': 'The company has created successfully'}, status=200)

Where can be the problem?

What does CompanySerializer look like?