Fatal error: Cannot redeclare class skin_kenka in /home/kropek/public_html/forum/sources/functions.php(568) : eval()'d code on line 1

ERROR: Unclosed quote @ 996
STR:
SQL: INSERT INTO vorum_forums (id, topics, posts, last_post, last_poster_id, last_poster_name, name, description, position, use_ibc, use_html, status, password, last_title, last_id, sort_key, sort_order, prune, show_rules, preview_posts, allow_poll, allow_pollbump, inc_postcount, skin_id, parent_id, quick_reply, redirect_url, redirect_on, redirect_hits, redirect_loc, rules_title, rules_text, topic_mm_id, notify_modq_emails, sub_can_post, permission_custom_error, permission_array, permission_showtopic, queued_topics, queued_posts, conv_parent) VALUES('8','7','30','1155224195','3','Mr.Kropek','Nowo?ci','Nowo?ci na stronie oraz forum. ','1','1','0','1','','[konkurs] Strona o Gothicu','409','last_post','Z-A','100',NULL,'0','1','0','1',NULL,'66','1','','0','0','','','','','','1','','a:5:{s:11:"start_perms";s:13:"1,3,4,11,9,13";s:11:"reply_perms";s:13:"1,3,4,11,9,13";s:10:"read_perms";s:15:"1,3,4,11,9,2,13";s:12:"upload_perms";s:1:"4";s:10:"show_perms";s:15:"1,3,4,11,9,2,13";}','0','0','0','1');

MySQL said:
#1054 - Unknown column 'conv_parent' in 'field list'