MYBB 1.6.4 Update Fatal error

[hankypanky2004]

This user has been denied support.

hello;

I download MYBB 1.6.4 package & upload all files to my existing MYBB 1.6.3.
all files uploaded, I run upgrade script, in the next page when Repairing Database Sequences, shows me this error:

Performing necessary upgrade queries...

Fatal error: [SQL] [1060] Duplicate column name 'custom_profile_fields'
ALTER TABLE mybb_adminviews ADD custom_profile_fields text NOT NULL AFTER conditions in /home/civileac/public_html/forum/inc/db_mysqli.php on line 557

Why? & what shall I do?

[faviouz]

http://community.mybb.com/thread-100134-...#pid730292