Unknown column 'main.Disabled' in 'where clause'

I have just finished upgrading from 3.2.1 to 3.4.2 and everything is
running smoothly except for custom fields. When I bring up a ticket,
I get a ton of these errors in the apache logs (repeated several times):

FastCGI: server “/var/www/rt/rt-3.4.2/bin/mason_handler.fcgi” stderr:
DBD::mysql::st execute failed: Unknown column ‘main.Disabled’ in
’where clause’ at /usr/lib/perl5/vendor_perl/5.8.6/DBIx/SearchBuilder/
Handle.pm line 480., referer: http://rt/Search/Results.html?
Query=Queue%20=%20’Technical%20Support’%20AND%20(Status%20=%20’open’%
20OR%20Status%20=%20’new’)&Rows=50

FastCGI: server “/var/www/rt/rt-3.4.2/bin/mason_handler.fcgi” stderr:
RT::Handle=HASH(0x95d6ba0) couldn’t execute the query ‘SELECT count
(main.id) FROM ObjectCustomFieldValues main WHERE ((main.Disabled =
‘0’)) AND ((main.ObjectId = ‘23707’)) AND ((main.ObjectType =
‘RT::Transaction’)) ’ at /usr/lib/perl5/vendor_perl/5.8.6/DBIx/
SearchBuilder/Handle.pm line 494., referer: http://rt/Search/
Results.html?Query=Queue%20=%20’Technical%20Support’%20AND%20(Status%
20=%20’open’%20OR%20Status%20=%20’new’)&Rows=50

And when I try to edit custom fields I get:

FastCGI: server “/var/www/rt/rt-3.4.2/bin/mason_handler.fcgi” stderr:
DBD::mysql::st execute failed: Unknown column ‘Disabled’ in ‘field
list’ at /usr/lib/perl5/vendor_perl/5.8.6/DBIx/SearchBuilder/
Handle.pm line 480., referer: http://rt/Ticket/Modify.html?id=4798

FastCGI: server “/var/www/rt/rt-3.4.2/bin/mason_handler.fcgi” stderr:
RT::Handle=HASH(0x95d6ba0) couldn’t execute the query ‘INSERT INTO
ObjectCustomFieldValues (ContentType, LargeContent, CustomField,
Creator, ObjectId, LastUpdatedBy, Disabled, Created, Content,
ContentEncoding, LastUpdated, ObjectType) VALUES
(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)’ at /usr/lib/perl5/vendor_perl/
5.8.6/DBIx/SearchBuilder/Handle.pm line 494., referer: http://rt/
Ticket/Modify.html?id=4798

I found elsewhere similar errors and the solution was to clear out
the Mason cache. The mason directories look empty and I’ve restarted
the Apache server. Is there anything else I can do or look at?

-James