Problems with fresh install

Hi, with fresh install on ubuntu 18.04 with last version on deb package i receive this error message after "sudo ralphctl migrate" i follow this docs for setup: https://ralph-ng.readthedocs.io/en/stable/installation/installation/

ubuntu@inventory:~$ sudo ralphctl migrate
Operations to perform:
Synchronize unmigrated apps: rest_framework, table, messages, django_rq, dc_view, staticfiles, ralph_admin, mptt, notifications, hooks, taggit_serializer, permissions, import_export, foundation, humanize
Apply all migrations: reports, data_importer, taggit, operations, supports, admin, reversion, contenttypes, sitetree, accounts, networks, custom_fields, transitions, auth, authtoken, ssl_certificates, data_center, dashboards, external_services, trade_marks, sessions, access_cards, dhcp, sim_cards, attachments, assets, domains, security, configuration_management, virtual, deployment, back_office, licences
Synchronizing apps without migrations:
Creating tables...
Running deferred SQL...
Installing custom SQL...
Running migrations:
Rendering model states... DONE
Applying assets.0012_auto_20160606_1409...Traceback (most recent call last):
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/db/backends/utils.py", line 62, in execute
return self.cursor.execute(sql)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/db/backends/mysql/base.py", line 124, in execute
return self.cursor.execute(query, args)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/MySQLdb/cursors.py", line 250, in execute
self.errorhandler(self, exc, value)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/MySQLdb/connections.py", line 50, in defaulterrorhandler
raise errorvalue
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/MySQLdb/cursors.py", line 247, in execute
res = self._query(query)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/MySQLdb/cursors.py", line 412, in _query
rowcount = self._do_query(q)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/MySQLdb/cursors.py", line 375, in _do_query
db.query(q)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/MySQLdb/connections.py", line 276, in query
_mysql.connection.query(self, query)
_mysql_exceptions.OperationalError: (1050, "Table 'assets_configurationclass' already exists")

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/opt/ralph/ralph-core/bin/ralph", line 8, in
sys.exit(prod())
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/ralph/__main__.py", line 28, in prod
main('ralph.settings.prod')
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/ralph/__main__.py", line 14, in main
execute_from_command_line(sys.argv)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/core/management/__init__.py", line 354, in execute_from_command_line
utility.execute()
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/core/management/__init__.py", line 346, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/core/management/base.py", line 394, in run_from_argv
self.execute(*args, **cmd_options)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/core/management/base.py", line 445, in execute
output = self.handle(*args, **options)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 222, in handle
executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/db/migrations/executor.py", line 110, in migrate
self.apply_migration(states[migration], migration, fake=fake, fake_initial=fake_initial)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/db/migrations/executor.py", line 148, in apply_migration
state = migration.apply(state, schema_editor)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/db/migrations/migration.py", line 115, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/db/migrations/operations/models.py", line 59, in database_forwards
schema_editor.create_model(model)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 286, in create_model
self.execute(sql, params or None)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 111, in execute
cursor.execute(sql, params)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/db/utils.py", line 98, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/utils/six.py", line 685, in reraise
raise value.with_traceback(tb)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/db/backends/utils.py", line 62, in execute
return self.cursor.execute(sql)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/django/db/backends/mysql/base.py", line 124, in execute
return self.cursor.execute(query, args)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/MySQLdb/cursors.py", line 250, in execute
self.errorhandler(self, exc, value)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/MySQLdb/connections.py", line 50, in defaulterrorhandler
raise errorvalue
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/MySQLdb/cursors.py", line 247, in execute
res = self._query(query)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/MySQLdb/cursors.py", line 412, in _query
rowcount = self._do_query(q)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/MySQLdb/cursors.py", line 375, in _do_query
db.query(q)
File "/opt/ralph/ralph-core/lib/python3.6/site-packages/MySQLdb/connections.py", line 276, in query
_mysql.connection.query(self, query)
django.db.utils.OperationalError: (1050, "Table 'assets_configurationclass' already exists")
ubuntu@inventory:~$