psycopg2.errors.UndefinedTable: relation "mydjangoapp_mymodel" does not exist

I am managing a django app built by third parts.

I have configured in settings.py the connection to a new db

'default': {  # changed'ENGINE': 'django.contrib.gis.db.backends.postgis','NAME': 'waterwatch','USER': 'waterwatch_main','PASSWORD': '****','HOST': 'localhost',}

Now I want to populate the new database with the table in my models.py, that is

class WaterConsumption(models.Model):    Id = models.IntegerField(primary_key=True)    Suburb = models.CharField(max_length=100)    NoOfSingleResProp = models.IntegerField()    AvgMonthlyKL = models.IntegerField()    AvgMonthlyKLPredicted = models.IntegerField()    PredictionAccuracy = models.IntegerField()    Month = models.CharField(max_length=50)    Year = models.IntegerField()    DateTime = models.DateTimeField()    geom = models.PointField()    def __str__(self):        return self.Suburb    class Meta:        verbose_name_plural = 'WaterConsumption'

so I run

python manage.py makemigrations

but I get

django.db.utils.ProgrammingError: relation "waterwatchapp_waterconsumption" does not exist

well... I guess that is obvious, I am actually trying to create new tables in my new database.

I guess something is wrong with the migrations.

so I have dropped and recreated the database, deleted all files in

• waterwatchapp/migrations , except __init__.py

• waterwatchapp/__pycache__

• waterwatch/__pycache__

But as I run again python manage.py makemigrations or python manage.py migrate, I still get the same error.

Why does django does not creates the tables anew?

It seems to me that django is still somehow following a sort of track of what was in the database before.

How can I remove all the migration history done before, and make django apply the migrations to a new database? (I don't care about the stored data)

Complete traceback.

Watching for file changes with StatReloaderException in thread django-main-thread:Traceback (most recent call last):  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/db/backends/utils.py", line 85, in _execute    return self.cursor.execute(sql, params)psycopg2.errors.UndefinedTable: relation "waterwatchapp_waterconsumption" does not existLINE 1: UPDATE "waterwatchapp_waterconsumption" SET "Suburb" = 'ATHL...               ^The above exception was the direct cause of the following exception:Traceback (most recent call last):  File "/usr/lib/python3.10/threading.py", line 1016, in _bootstrap_inner    self.run()  File "/usr/lib/python3.10/threading.py", line 953, in run    self._target(*self._args, **self._kwargs)  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/utils/autoreload.py", line 64, in wrapper    fn(*args, **kwargs)  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/core/management/commands/runserver.py", line 115, in inner_run    autoreload.raise_last_exception()  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/utils/autoreload.py", line 87, in raise_last_exception    raise _exception[1]  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/core/management/__init__.py", line 381, in execute    autoreload.check_errors(django.setup)()  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/utils/autoreload.py", line 64, in wrapper    fn(*args, **kwargs)  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/__init__.py", line 24, in setup    apps.populate(settings.INSTALLED_APPS)  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/apps/registry.py", line 122, in populate    app_config.ready()  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/contrib/admin/apps.py", line 27, in ready    self.module.autodiscover()  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/contrib/admin/__init__.py", line 24, in autodiscover    autodiscover_modules('admin', register_to=site)  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/utils/module_loading.py", line 57, in autodiscover_modules    import_module('%s.%s' % (app_config.name, module_to_search))  File "/usr/lib/python3.10/importlib/__init__.py", line 126, in import_module    return _bootstrap._gcd_import(name[level:], package, level)  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked  File "<frozen importlib._bootstrap_external>", line 883, in exec_module  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/waterwatchapp/admin.py", line 44, in <module>    ).save()  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/db/models/base.py", line 743, in save    self.save_base(using=using, force_insert=force_insert,  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/db/models/base.py", line 780, in save_base    updated = self._save_table(  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/db/models/base.py", line 862, in _save_table    updated = self._do_update(base_qs, using, pk_val, values, update_fields,  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/db/models/base.py", line 916, in _do_update    return filtered._update(values) > 0  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/db/models/query.py", line 809, in _update    return query.get_compiler(self.db).execute_sql(CURSOR)  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/db/models/sql/compiler.py", line 1591, in execute_sql    cursor = super().execute_sql(result_type)  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/db/models/sql/compiler.py", line 1202, in execute_sql    cursor.execute(sql, params)  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/db/backends/utils.py", line 99, in execute    return super().execute(sql, params)  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/db/backends/utils.py", line 67, in execute    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/db/backends/utils.py", line 76, in _execute_with_wrappers    return executor(sql, params, many, context)  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/db/backends/utils.py", line 80, in _execute    with self.db.wrap_database_errors:  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/db/utils.py", line 90, in __exit__    raise dj_exc_value.with_traceback(traceback) from exc_value  File "/home/tommaso/tommaso03/coding_projects/corsi_udemy/create-smart-maps-in-python-and-leaflet/waterwatch/venv/lib/python3.10/site-packages/django/db/backends/utils.py", line 85, in _execute    return self.cursor.execute(sql, params)django.db.utils.ProgrammingError: relation "waterwatchapp_waterconsumption" does not existLINE 1: UPDATE "waterwatchapp_waterconsumption" SET "Suburb" = 'ATHL...