no such column: askbot_post.language_code

retag add tags

Request URL:    http://iticy.com:443/questions/
Django Version: 1.4.3
Exception Type: DatabaseError
Exception Value:    
no such column: askbot_post.language_code
Exception Location: /usr/lib/python2.6/site-packages/Django-1.4.3-py2.6.egg/django/db/backends/sqlite3/base.py in execute, line 344
Python Executable:  /usr/bin/python
Python Version: 2.6.6

How to fix this in easy steps please ?