django.db.utils.OperationalError: near ")": syntax error ERROR at $ python3 manage.py migrate

Dear Django-ers,

I ran into a problem with Django.

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Situation:

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I am using version 1.10.3 of Django.

For the fifth time I updated my table related classes in models.py.

The 4 previous time this ran well all through

(1) The server ran and did not complain about syntax errors or anything else.

and

(2) $ python3 manage.py makemigrations

but in

(3) $ python3 manage.py migrate

I get the problem mentioned below when running 

The log of (2) and (3) is given below.

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Questions:

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Any tips on how to solve it?

How can I relate this to my own code in models.py?

Do I really need to revert back to my previously (checked in) version of models.py?

And then do small incremental steps again?

Or is there a better way?

(Unluckily I cannot share the models.py file.)

thanks and best regards,

Peter

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(2)

$ python3 manage.py makemigrations

Migrations for 'market':

  market/migrations/0006_auto_20161114_1741.py:

    - Alter field code on bidstate

    - Alter field code on coordinationschemevariant

    - Alter field code on networktype

    - Alter field code on segmenttype

Herettix:SmartNet peter$ 

(3)

Herettix:SmartNet peter$ python3 manage.py makemigrations

Did you rename the market.SegmentType model to SegmentSlope? [y/N] y

Did you rename qbiddataarray.segmentType to qbiddataarray.segmentSlope (a ForeignKey)? [y/N] y

Migrations for 'market':

  market/migrations/0007_auto_20161114_1742.py:

    - Rename model SegmentType to SegmentSlope

    - Rename field segmentType on qbiddataarray to segmentSlope

Herettix:SmartNet peter$ 

Herettix:SmartNet peter$ 

Herettix:SmartNet peter$ python3 manage.py migrate

Operations to perform:

  Apply all migrations: admin, auth, contenttypes, market, sessions

Running migrations:

  Applying market.0005_auto_20161114_1254...Traceback (most recent call last):

  File "/usr/local/lib/python3.4/site-packages/django/db/backends/utils.py", line 64, in execute

    return self.cursor.execute(sql, params)

  File "/usr/local/lib/python3.4/site-packages/django/db/backends/sqlite3/base.py", line 337, in execute

    return Database.Cursor.execute(self, query, params)

sqlite3.OperationalError: near ")": syntax error

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

Traceback (most recent call last):

  File "manage.py", line 22, in <module>

    execute_from_command_line(sys.argv)

  File "/usr/local/lib/python3.4/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line

    utility.execute()

  File "/usr/local/lib/python3.4/site-packages/django/core/management/__init__.py", line 359, in execute

    self.fetch_command(subcommand).run_from_argv(self.argv)

  File "/usr/local/lib/python3.4/site-packages/django/core/management/base.py", line 294, in run_from_argv

    self.execute(*args, **cmd_options)

  File "/usr/local/lib/python3.4/site-packages/django/core/management/base.py", line 345, in execute

    output = self.handle(*args, **options)

  File "/usr/local/lib/python3.4/site-packages/django/core/management/commands/migrate.py", line 204, in handle

    fake_initial=fake_initial,

  File "/usr/local/lib/python3.4/site-packages/django/db/migrations/executor.py", line 115, in migrate

    state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)

  File "/usr/local/lib/python3.4/site-packages/django/db/migrations/executor.py", line 145, in _migrate_all_forwards

    state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)

  File "/usr/local/lib/python3.4/site-packages/django/db/migrations/executor.py", line 244, in apply_migration

    state = migration.apply(state, schema_editor)

  File "/usr/local/lib/python3.4/site-packages/django/db/migrations/migration.py", line 129, in apply

    operation.database_forwards(self.app_label, schema_editor, old_state, project_state)

  File "/usr/local/lib/python3.4/site-packages/django/db/migrations/operations/fields.py", line 147, in database_forwards

    schema_editor.remove_field(from_model, from_model._meta.get_field(self.name))

  File "/usr/local/lib/python3.4/site-packages/django/db/backends/sqlite3/schema.py", line 249, in remove_field

    self._remake_table(model, delete_fields=[field])

  File "/usr/local/lib/python3.4/site-packages/django/db/backends/sqlite3/schema.py", line 199, in _remake_table

    self.quote_name(model._meta.db_table),

  File "/usr/local/lib/python3.4/site-packages/django/db/backends/base/schema.py", line 112, in execute

    cursor.execute(sql, params)

  File "/usr/local/lib/python3.4/site-packages/django/db/backends/utils.py", line 79, in execute

    return super(CursorDebugWrapper, self).execute(sql, params)

  File "/usr/local/lib/python3.4/site-packages/django/db/backends/utils.py", line 64, in execute

    return self.cursor.execute(sql, params)

  File "/usr/local/lib/python3.4/site-packages/django/db/utils.py", line 94, in __exit__

    six.reraise(dj_exc_type, dj_exc_value, traceback)

  File "/usr/local/lib/python3.4/site-packages/django/utils/six.py", line 685, in reraise

    raise value.with_traceback(tb)

  File "/usr/local/lib/python3.4/site-packages/django/db/backends/utils.py", line 64, in execute

    return self.cursor.execute(sql, params)

  File "/usr/local/lib/python3.4/site-packages/django/db/backends/sqlite3/base.py", line 337, in execute

    return Database.Cursor.execute(self, query, params)

django.db.utils.OperationalError: near ")": syntax error

Herettix:SmartNet peter$ 

The line 337 of 

File "/usr/local/lib/python3.4/site-packages/django/db/backends/sqlite3/base.py"

is the return statement on the last line below:

class SQLiteCursorWrapper(Database.Cursor):

    """

    Django uses "format" style placeholders, but pysqlite2 uses "qmark" style.

    This fixes it -- but note that if you want to use a literal "%s" in a query,

    you'll need to use "%%s".

    """

    def execute(self, query, params=None):

        if params is None:

            return Database.Cursor.execute(self, query)

        query = self.convert_query(query)

        return Database.Cursor.execute(self, query, params)

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