Upgrade error: canceling statement due to statement timeout

edit

I tried to upgrade askbot from 0.7.43 to 0.7.48. But got the following errors: 1) In migrate process:

 - Migrating forwards to 0161_add_field__user_languages.
 > askbot:0158_add_title_search_indices_for_postgresql_and_mysql
Traceback (most recent call last):
  File "manage.py", line 11, in <module>
    execute_manager(settings)
  File "/home/alekcac/webapps/askbot_webapp_7_48/lib/python2.7/django/core/management/__init__.py", line 459, in execute_manager
    utility.execute()
  File "/home/alekcac/webapps/askbot_webapp_7_48/lib/python2.7/django/core/management/__init__.py", line 382, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/alekcac/webapps/askbot_webapp_7_48/lib/python2.7/django/core/management/base.py", line 196, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/home/alekcac/webapps/askbot_webapp_7_48/lib/python2.7/django/core/management/base.py", line 232, in execute
    output = self.handle(*args, **options)
  File "/home/alekcac/lib/python2.7/South-0.7.3-py2.7.egg/south/management/commands/migrate.py", line 105, in handle
    ignore_ghosts = ignore_ghosts,
  File "/home/alekcac/lib/python2.7/South-0.7.3-py2.7.egg/south/migration/__init__.py", line 191, in migrate_app
    success = migrator.migrate_many(target, workplan, database)
  File "/home/alekcac/lib/python2.7/South-0.7.3-py2.7.egg/south/migration/migrators.py", line 221, in migrate_many
    result = migrator.__class__.migrate_many(migrator, target, migrations, database)
  File "/home/alekcac/lib/python2.7/South-0.7.3-py2.7.egg/south/migration/migrators.py", line 292, in migrate_many
    result = self.migrate(migration, database)
  File "/home/alekcac/lib/python2.7/South-0.7.3-py2.7.egg/south/migration/migrators.py", line 125, in migrate
    result = self.run(migration)
  File "/home/alekcac/lib/python2.7/South-0.7.3-py2.7.egg/south/migration/migrators.py", line 99, in run
    return self.run_migration(migration)
  File "/home/alekcac/lib/python2.7/South-0.7.3-py2.7.egg/south/migration/migrators.py", line 81, in run_migration
    migration_function()
  File "/home/alekcac/lib/python2.7/South-0.7.3-py2.7.egg/south/migration/migrators.py", line 57, in <lambda>
    return (lambda: direction(orm))
  File "/home/alekcac/webapps/askbot_webapp_7_48/myaskbot/askbot/migrations/0158_add_title_search_indices_for_postgresql_and_mysql.py", line 33, in forwards
    postgresql.setup_full_text_search(script_path)
  File "/home/alekcac/webapps/askbot_webapp_7_48/myaskbot/askbot/search/postgresql/__init__.py", line 21, in setup_full_text_search
    cursor.execute(fts_init_query)
  File "/home/alekcac/webapps/askbot_webapp_7_48/lib/python2.7/django/db/backends/postgresql_psycopg2/base.py", line 52, in execute
    return self.cursor.execute(query, args)
django.db.utils.DatabaseError: canceling statement due to statement timeout
CONTEXT:  PL/pgSQL function "get_thread_question_tsv" line 9 at RETURN
PL/pgSQL function "thread_update_trigger" line 3 at assignment
SQL statement "UPDATE askbot_thread SET id=new.thread_id WHERE id=new.thread_id"
PL/pgSQL function "post_trigger" line 12 at SQL statement
SQL statement "UPDATE askbot_post SET text_search_vector=NULL"
PL/pgSQL function "add_tsvector_column" line 11 at EXECUTE statement

2) When I tried to open any question I get:

column askbot_thread.language_code does not exist
LINE 1: ...ivity_at", "askbot_thread"."last_activity_by_id", "askbot_th...

Could you give any advice about it?