problème mise à jour version 9.5 en 10.5 !!

Je viens de me rendre compte que je n'ai plus la possibilité d'ajouter un utilisateur. Il m'affiche ce message:

NSERT INTO yacs_users SET active='Y', aim_address='', alternate_number='', avatar_url='', birth_date='0000-00-00 00:00:00', capability='M', create_name='....', create_id=3, create_address='..............', create_date='2010-07-21 20:48:18', description='', edit_name='simo', edit_id=3, edit_address='.......................', edit_action='new', edit_date='2010-07-21 20:48:18', editor='tinymce', email='', from_where='', full_name='mil', handle='c808c72ee4d1a8e6054f666af39c733f', icq_address='', interface='I', introduction='', irc_address='', jabber_address='', language='none', msn_address='', nick_name='....', options='', overlay='', overlay_id='', password='da937a066b0348bf22d22c2457b4ba78', pgp_key='', phone_number='', post_date='2010-07-21 20:48:18', posts=0, proxy_address='', signature='', skype_address='', tags='', twitter_address='', vcard_agent='', vcard_label='', vcard_organization='', vcard_title='', web_address='', with_newsletters='Y', with_sharing='N', without_alerts='N', without_confirmations='N', without_messages='N', yahoo_address='' 1054: Unknown column 'twitter_address' in 'field list'