カスタムユーザーでの認証時にユーザー名から登録情報を編集できない(Django)

カスタムユーザーでの認証時にユーザー名から登録情報を編集できません。
Django　4.0.3

次のようなカスタムユーザーモデルを実装しました。

Python:models.py
1from django.db import models
2from django.contrib.auth.models import AbstractBaseUser, BaseUserManager, PermissionsMixin
3from django.contrib.auth.validators import UnicodeUsernameValidator
4from django.core.mail import send_mail
5from django.utils import timezone
6from django.utils.translation import gettext_lazy as _
7
8# Create your models here.
9
10
11class DiaryUserManager(BaseUserManager):
12    use_in_migration = True
13
14    def _create_user(self, username, email, password, **extra_fields):
15        if not username:
16            raise ValueError('ユーザーネームを入力してください')
17        if not email:
18            raise ValueError('Emailを入力して下さい')
19        email = self.normalize_email(email)
20        username = self.model.normalize_username(username)
21        user = self.model(username=username, email=email, **extra_fields)
22        user.set_password(password)
23        user.save(using=self.db)
24        return user
25
26    def create_user(self, username, email, password=None, **extra_fields):
27        extra_fields.setdefault('is_active', False)
28        extra_fields.setdefault('is_staff', False)
29        extra_fields.setdefault('is_superuser', False)
30        return self._create_user(email, username, password, **extra_fields)
31
32    def create_superuser(self, username, email, **extra_fields):
33        extra_fields.setdefault('is_staff', True)
34        extra_fields.setdefault('is_superuser', True)
35        extra_fields.setdefault('is_active', True)
36        extra_fields.setdefault('first_name','DEFAULT_FIRST_NAME')
37        extra_fields.setdefault('last_name','DEFAULT_LAST_NAME')
38        if extra_fields.get('is_staff') is not True:
39            raise ValueError('is_staff=Trueである必要があります。')
40        if extra_fields.get('is_superuser') is not True:
41            raise ValueError('is_superuser=Trueである必要があります。')
42        return self._create_user(username, email, **extra_fields)
43
44
45class DiaryUser(AbstractBaseUser, PermissionsMixin):
46    class_id = models.IntegerField(null=True, unique=True)
47    username_validator = UnicodeUsernameValidator()
48
49    username = models.CharField(
50        _("username"),
51        max_length=150,
52        unique=True,
53        help_text=_(
54            "Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only."
55        ),
56        validators=[username_validator],
57        error_messages={
58            "unique": _("A user with that username already exists."),
59        },
60    )
61    first_name = models.CharField(
62        _("first name"), max_length=50, blank=False, null=False)
63    last_name = models.CharField(
64        _("last name"), max_length=50, blank=False, null=False)
65    email = models.EmailField(_("email address"), blank=True)
66    is_staff = models.BooleanField(
67        _("staff status"),
68        default=False,
69        help_text=_(
70            "Designates whether the user can log into this admin site."),
71    )
72    is_active = models.BooleanField(
73        _("active"),
74        default=False,
75        help_text=_(
76            "Designates whether this user should be treated as active. "
77            "Unselect this instead of deleting accounts."
78        ),
79    )
80    date_joined = models.DateTimeField(_("date joined"), default=timezone.now)
81
82    objects = DiaryUserManager()
83
84    EMAIL_FIELD = "email"
85    USERNAME_FIELD = "username"
86    REQUIRED_FIELDS = ["email"]
87
88    class Meta:
89        verbose_name = _("user")
90        verbose_name_plural = _("users")
91
92    def clean(self):
93        super().clean()
94        self.email = self.__class__.objects.normalize_email(self.email)
95
96    def get_full_name(self):
97        """
98        Return the first_name plus the last_name, with a space in between.
99        """
100        full_name = "%s %s" % (self.first_name, self.last_name)
101        return full_name.strip()
102
103    def get_short_name(self):
104        """Return the short name for the user."""
105        return self.first_name
106
107    def email_user(self, subject, message, from_email=None, **kwargs):
108        """Send an email to this user."""
109        send_mail(subject, message, from_email, [self.email], **kwargs)
110

管理画面の実装

Python:admin.py
1from django.contrib import admin
2from django.contrib.auth.admin import UserAdmin
3from .models import DiaryUser
4
5from . import models
6# Register your models here
7
8class DiaryUserAdmin(UserAdmin):
9
10    list_display = ('class_id', 'username',
11                    'last_name', 'first_name', 'is_active', 'last_login')
12    search_fields = ('username',)
13    ordering = ('class_id', )
14    list_filter = ('is_active', )
15
16    fieldsets = (
17        ('user info', {'fields': ('class_id', 'username',
18         'password', 'last_name', 'first_name', 'email')}),
19        ('permission', {'fields': ('is_staff', 'is_active', 'is_superuser')}),
20    )
21    add_fieldsets = (
22        ('user info', {'fields': ('class_id', 'username',
23         'password', 'last_name', 'first_name', 'email')}),
24        ('permission', {'fields': ('is_staff', 'is_active', 'is_superuser')}),
25    )
26
27
28admin.site.register(DiaryUser, DiaryUserAdmin)
29