PHP报错Declaration of table_forum_post

windows2008IIS7.5服务器，最近出现这个错误问题，求指导：
[03-Sep-2016 02:55:28 Etc/GMT-8] PHP Strict Standards:  Declaration of table_forum_post::update_cache() should be compatible with discuz_table::update_cache($id, $data, $cache_ttl = NULL, $pre_cache_key = NULL) in F:\web\www.XXX.com\source\class\table\table_forum_post.php on line 881
[03-Sep-2016 09:23:37 Etc/GMT-8] PHP Strict Standards:  Declaration of table_forum_post::update() should be compatible with discuz_table::update($val, $data, $unbuffered = false, $low_priority = false) in F:\web\www.XXX.com\source\class\table\table_forum_post.php on line 881
[03-Sep-2016 09:23:37 Etc/GMT-8] PHP Strict Standards:  Declaration of table_forum_post::delete() should be compatible with discuz_table::delete($val, $unbuffered = false) in F:\web\www.XXX.com\source\class\table\table_forum_post.php on line 881
[03-Sep-2016 09:23:37 Etc/GMT-8] PHP Strict Standards:  Declaration of table_forum_post::insert() should be compatible with discuz_table::insert($data, $return_insert_id = false, $replace = false, $silent = false) in F:\web\www.XXX.com\source\class\table\table_forum_post.php on line 881
[03-Sep-2016 09:23:37 Etc/GMT-8] PHP Strict Standards:  Declaration of table_forum_post::fetch() should be compatible with discuz_table::fetch($id, $force_from_db = false) in F:\web\www.XXX.com\source\class\table\table_forum_post.php on line 881
[03-Sep-2016 09:23:37 Etc/GMT-8] PHP Strict Standards:  Declaration of table_forum_post::fetch_all() should be compatible with discuz_table::fetch_all($ids, $force_from_db = false) in F:\web\www.XXX.com\source\class\table\table_forum_post.php on line 881
[03-Sep-2016 09:23:37 Etc/GMT-8] PHP Strict Standards:  Declaration of table_forum_post::update_cache() should be compatible with discuz_table::update_cache($id, $data, $cache_ttl = NULL, $pre_cache_key = NULL) in F:\web\www.XXX.com\source\class\table\table_forum_post.php on line 881