Erros no PHPNUKE

Ola pessoal

estou começando a mexer com phpnuke. Coloquei o 6.8 e tudo beleza mas no /var/log/apache/errors_log aparece um monte de erros em cada página que eu entro.
O que pode ser?

[Mon Sep 15 11:12:39 2003] [error] PHP Notice: Use of undefined constant topic - assumed ´topic´ in /var/www/htdocs/modules/News/index.php on line 77
[Mon Sep 15 11:12:39 2003] [error] PHP Notice: Use of undefined constant informant - assumed ´informant´ in /var/www/htdocs/modules/News/index.php on line 78
[Mon Sep 15 11:12:39 2003] [error] PHP Notice: Use of undefined constant notes - assumed ´notes´ in /var/www/htdocs/modules/News/index.php on line 79
[Mon Sep 15 11:12:39 2003] [error] PHP Notice: Use of undefined constant acomm - assumed ´acomm´ in /var/www/htdocs/modules/News/index.php on line 80
[Mon Sep 15 11:12:39 2003] [error] PHP Notice: Use of undefined constant score - assumed ´score´ in /var/www/htdocs/modules/News/index.php on line 81
[Mon Sep 15 11:12:39 2003] [error] PHP Notice: Use of undefined constant ratings - assumed ´ratings´ in /var/www/htdocs/modules/News/index.php on line 82
[Mon Sep 15 11:12:39 2003] [error] PHP Notice: Use of undefined constant title - assumed ´title´ in /var/www/htdocs/modules/News/index.php on line 87
[Mon Sep 15 11:12:39 2003] [error] PHP Notice: Use of undefined constant topicid - assumed ´topicid´ in /var/www/htdocs/mainfile.php on line 803
[Mon Sep 15 11:12:39 2003] [error] PHP Notice: Use of undefined constant topicname - assumed ´topicname´ in /var/www/htdocs/mainfile.php on line 804
[Mon Sep 15 11:12:39 2003] [error] PHP Notice: Use of undefined constant topicimage - assumed ´topicimage´ in /var/www/htdocs/mainfile.php on line 805
[Mon Sep 15 11:12:39 2003] [error] PHP Notice: Use of undefined constant topictext - assumed ´topictext´ in /var/www/htdocs/mainfile.php on line 806
[Mon Sep 15 11:12:39 2003] [error] PHP Notice: Undefined index: 2 in /var/www/htdocs/mainfile.php on line 217