[Olli460]

I get this error when I tried importing the product.
Database error in vBulletin 3.5.4:

Invalid SQL:
alter table user add vbchat_pref_font_face varchar(255) not null default '',add vbchat_pref_font_color varchar(255) not null default '',add vbchat_pref_user_ignore text not null default '';;

MySQL Error : Duplicate column name 'vbchat_pref_font_face'
Error Number : 1060

This is following the text instructions and I get this error. Does anyone know how I can fix it? I dont even know why its giving this error because font_face is not even duplicating itself anywhere in the xml script.