Hmm seems to be a knockoff of Nuke Platinum.
Ok emm the "aid" refered to is in nuke_authors, try creating that field again, using the following sql text in phpmyadmin, that will reset your admin Username & Password so you'll need to set that up again.
Code:
DROP TABLE IF EXISTS nuke_authors;
CREATE TABLE nuke_authors (
aid varchar(25) NOT NULL default '',
name varchar(50) default NULL,
url varchar(255) NOT NULL default '',
email varchar(255) NOT NULL default '',
pwd varchar(40) default NULL,
counter int(11) NOT NULL default '0',
radminsuper tinyint(1) NOT NULL default '1',
admlanguage varchar(30) NOT NULL default '',
PRIMARY KEY (aid),
KEY aid (aid)
) TYPE=MyISAM;
BTW just asking did you edit the sites key in config.php ?