? File "C:\Users\cjc\PycharmProjects\pythonProject3\demo\blog\models.py", line 4, in <module>

? ? class Article(models.Model):

? File "C:\Users\cjc\PycharmProjects\pythonProject3\demo\blog\models.py", line 6, in Article

? ? article_id = models.AutoField(Primary_key=True)

? File "C:\Users\cjc\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\__init__.py", line 2455, in __init__

? ? super().__init__(*args, **kwargs)

TypeError: __init__() got an unexpected keyword argument 'Primary_key'