I just tried updating my Coppermine Gallery from version 1.4.19 to 1.5.6, but I got the error :
Upgrade failed! Errors are:
Upgrade failed (Can't coerce GLOB to string in or at /opt/lib/perl5/bl/BL/InstallCentral/Coppermine.pm line 160.
Stack:
[/opt/lib/perl5/bl/BL/InstallCentral/Coppermine.pm:160]
[/opt/lib/perl5/bl/BL/InstallCentral/Coppermine.pm:124]
[/opt/lib/perl5/bl/BL/InstallCentral/Installer.pm:655]
[/opt/lib/perl5/bl/BL/InstallCentral/Installer.pm:620]
[/home/bizland/member/InstallCentral/Applications/autohandler:1483]
[/opt/lib/perl5/site_perl/5.8.8/HTML/Mason/Request.pm:908]
[/home/bizland/member/InstallCentral/Applications/autohandler:2112]
[/home/bizland/member/InstallCentral/Applications/autohandler:1463]
[/opt/lib/perl5/site_perl/5.8.8/HTML/Mason/Request.pm:908]
[/home/bizland/member/InstallCentral/Applications/autohandler:2105]
[/home/bizland/member/InstallCentral/Applications/autohandler:28]
[/opt/lib/perl5/site_perl/5.8.8/HTML/Mason/Request.pm:908]
[/home/bizland/member/InstallCentral/Applications/autohandler:2171]
[/home/bizland/member/autohandler:65]
[/home/bizland/autohandler:9]
)!
So I enable the debug mode from phpMyAdmin and I reloaded my gallery. I now get the error :
While executing query 'SELECT MAX(group_quota) AS disk_max, MIN(group_quota) AS disk_min, MAX(can_rate_pictures) AS can_rate_pictures, MAX(can_send_ecards) AS can_send_ecards, MAX(can_post_comments) AS can_post_comments, MAX(can_upload_pictures) AS can_upload_pictures, MAX(can_create_albums) AS can_create_albums, MAX(has_admin_access) AS has_admin_access, MAX(access_level) AS access_level, MIN(pub_upl_need_approval) AS pub_upl_need_approval, MIN( priv_upl_need_approval) AS priv_upl_need_approval FROM cpg148_usergroups WHERE group_id in (3)' in bridge/udb_base.inc.php on line 321
mySQL error: Unknown column 'access_level' in 'field list'
I have no idea what to do now. I can't afford to lose my gallery.

Please help!
My gallery :
www.tokiohotelindia.com/gallery