# Django 4.0.3: "Error no such table" when i add or modify models in existing apps **URL:** \ **Category:** Mystery Errors\ **Created:** [July 7, 2022, 12:09pm UTC](https://forum.djangoproject.com/t/django-4-0-3-error-no-such-table-when-i-add-or-modify-models-in-existing-apps/14673 "2022-07-07T12:09:01Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![ptrs32](https://avatars.discourse-cdn.com/v4/letter/p/47e85d/32.png) [@ptrs32](https://forum.djangoproject.com/u/ptrs32)\ **Post date:** [July 7, 2022, 12:09pm UTC](https://forum.djangoproject.com/t/django-4-0-3-error-no-such-table-when-i-add-or-modify-models-in-existing-apps/14673/1 "2022-07-07T12:09:01Z")
Hello everyone, I have a problem with a function that seems simple to me from Django, which is adding or modifying a Model in an application. To add a model in an already existing application with tables already migrated, I follow the following steps: 1 - I create the new class, after the others, in my _models.py_ file 2 - I add the line `admin.site.register(myNewModel)` in _admin.py_ 3 - I run a `python manage.py makemigrations myApp` and I can see my table in the text that appears. 4 - Then a `python manage.py migrate myApp` Then I open my admin space of the project and I see that the new table is present, except that when I click on it I have an error page > OperationalError at/admin/myApp/myNewModel/ > no such table: myApp\_myNewModel and also it is impossible to add anything in, it’s actually not created… I have been searching for a long time and what works is to completely delete my database before launching a makemigrations/migrate but I would like to find a less radical solution. I have Django 4.0.3 and the base is the default is in sqlite3. Thank you in advance for your answers, do not hesitate if you need more information. ---
**Author:** ![KenWhitesell](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.djangoproject.com/kenwhitesell/32/280_2.png) [@KenWhitesell](https://forum.djangoproject.com/u/KenWhitesell)\ **Post date:** [July 7, 2022, 2:27pm UTC](https://forum.djangoproject.com/t/django-4-0-3-error-no-such-table-when-i-add-or-modify-models-in-existing-apps/14673/2 "2022-07-07T14:27:39Z")
What output do you get from `python manage.py migrate myApp`? What does `python manage.py showmigrations` show? What does your new model look like?