Почему при Model.objects.create() вылетает ошибка duplicate key value violates unique constraint?

Question

[NyxDeveloper]

Ошибка бросается в момент сохранения объекта, проблема заключается в том, что Model.objects.create() дает новому объекту id уже существующего, проверил дебаггером. Почему он это делает и как сделать так чтобы он генерировал новый? До недавнего времени все было нормально и id генерировались как надо, но вдруг в одном месте это перестало работать.
Вот трейсбэк:

Environment:


Request Method: POST
Request URL: http://192.168.10.222:8080/base/add_merop_from_template/1/

Django Version: 2.2
Python Version: 3.8.7
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'debug_toolbar',
 'templatesApp.apps.TemplatesappConfig',
 'changelog.apps.ChangelogConfig',
 'accounts.apps.AccountsConfig',
 'dashboard.apps.DashboardConfig',
 'reference.apps.ReferenceConfig',
 'baseTables.apps.BasetablesConfig',
 'adminTables.apps.AdmintablesConfig',
 'reps.apps.RepsConfig']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'debug_toolbar.middleware.DebugToolbarMiddleware']



Traceback:

File "/usr/local/lib/python3.8/dist-packages/django/db/backends/utils.py" in _execute
  84.                 return self.cursor.execute(sql, params)

The above exception (duplicate key value violates unique constraint "baseTables_merop_pkey"
DETAIL:  Key (id)=(19) already exists.
) was the direct cause of the following exception:

File "/usr/local/lib/python3.8/dist-packages/django/core/handlers/exception.py" in inner
  34.             response = get_response(request)

File "/usr/local/lib/python3.8/dist-packages/django/core/handlers/base.py" in _get_response
  115.                 response = self.process_exception_by_middleware(e, request)

File "/usr/local/lib/python3.8/dist-packages/django/core/handlers/base.py" in _get_response
  113.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/usr/local/lib/python3.8/dist-packages/django/contrib/auth/decorators.py" in _wrapped_view
  21.                 return view_func(request, *args, **kwargs)

File "/usr/local/lib/python3.8/dist-packages/django/contrib/auth/decorators.py" in _wrapped_view
  21.                 return view_func(request, *args, **kwargs)

File "/home/itpw/project/nik/vkmtsup_django/vkmt_sup/baseTables/views.py" in AddMeropFromTemplate
  1748.                 m = Merop.objects.create()

File "/usr/local/lib/python3.8/dist-packages/django/db/models/manager.py" in manager_method
  82.                 return getattr(self.get_queryset(), name)(*args, **kwargs)

File "/usr/local/lib/python3.8/dist-packages/django/db/models/query.py" in create
  422.         obj.save(force_insert=True, using=self.db)

File "/usr/local/lib/python3.8/dist-packages/django/db/models/base.py" in save
  740.         self.save_base(using=using, force_insert=force_insert,

File "/usr/local/lib/python3.8/dist-packages/django/db/models/base.py" in save_base
  777.             updated = self._save_table(

File "/usr/local/lib/python3.8/dist-packages/django/db/models/base.py" in _save_table
  870.             result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)

File "/usr/local/lib/python3.8/dist-packages/django/db/models/base.py" in _do_insert
  907.         return manager._insert([self], fields=fields, return_id=update_pk,

File "/usr/local/lib/python3.8/dist-packages/django/db/models/manager.py" in manager_method
  82.                 return getattr(self.get_queryset(), name)(*args, **kwargs)

File "/usr/local/lib/python3.8/dist-packages/django/db/models/query.py" in _insert
  1186.         return query.get_compiler(using=using).execute_sql(return_id)

File "/usr/local/lib/python3.8/dist-packages/django/db/models/sql/compiler.py" in execute_sql
  1332.                 cursor.execute(sql, params)

File "/usr/local/lib/python3.8/dist-packages/django/db/backends/utils.py" in execute
  99.             return super().execute(sql, params)

File "/usr/local/lib/python3.8/dist-packages/django/db/backends/utils.py" in execute
  67.         return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)

File "/usr/local/lib/python3.8/dist-packages/django/db/backends/utils.py" in _execute_with_wrappers
  76.         return executor(sql, params, many, context)

File "/usr/local/lib/python3.8/dist-packages/django/db/backends/utils.py" in _execute
  84.                 return self.cursor.execute(sql, params)

File "/usr/local/lib/python3.8/dist-packages/django/db/utils.py" in __exit__
  89.                 raise dj_exc_value.with_traceback(traceback) from exc_value

File "/usr/local/lib/python3.8/dist-packages/django/db/backends/utils.py" in _execute
  84.                 return self.cursor.execute(sql, params)

Exception Type: IntegrityError at /base/add_merop_from_template/1/
Exception Value: duplicate key value violates unique constraint "baseTables_merop_pkey"
DETAIL:  Key (id)=(19) already exists.