DELETE FROM `access` WHERE `forumid` = '302';
DELETE FROM `announcement` WHERE `forumid` = '302';
DELETE FROM `forum` WHERE `forumid` = '302';
DELETE FROM `forumpermission` WHERE `forumid` = '302';
DELETE FROM `forumread` WHERE `forumid` = '302';
DELETE FROM `moderator` WHERE `forumid` = '302';
DELETE FROM `moderatorlog` WHERE `forumid` = '302';
DELETE FROM `podcast` WHERE `forumid` = '302';
DELETE FROM `rssfeed` WHERE `forumid` = '302';
DELETE FROM `subscribeforum` WHERE `forumid` = '302';
DELETE FROM `tachyforumpost` WHERE `forumid` = '302';
DELETE FROM `thread` WHERE `forumid` = '302';

ama önce bi yedek almanı öneririm