Drupal 7.23当我打开页面时（作为匿名用户），我会定期收到警告和错误消息。标题徽标的副本出现在页面的最后，位于错误消息的正上方。 我无法理解当出现此警告&错误时的情况，但似乎在我以匿名用户的身份打开页面时出现。然后登录后，注销，不再显示任何错误。Drupal 7.23打开页面时出现警告和错误信息
警告：
Warning: Cannot modify header information - headers already sent by (output started at /home/ztiw7851207/public_html/includes/common.inc:2700) in drupal_send_headers() (line 1220 of /home/ztiw7851207/public_html/includes/bootstrap.inc).
Warning: Cannot modify header information - headers already sent by (output started at /home/ztiw7851207/public_html/includes/common.inc:2700) in drupal_send_headers() (line 1216 of /home/ztiw7851207/public_html/includes/bootstrap.inc).
错误：
PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '' for key 'title': INSERT INTO {aggregator_feed} (fid, url, link, description, image, hash, etag, modified) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7); Array ( [:db_insert_placeholder_0] => 9 [:db_insert_placeholder_1] => http://hitech.com/rss/reviews/ [:db_insert_placeholder_2] => http://hitech.com/reviews/ [:db_insert_placeholder_3] => News, reviews and opinion outlet with obsessive coverage of cutting edge gadgets, consumer electronics and the science and technology they're built upon. [:db_insert_placeholder_4] => http://hitech.com/img/rss_cover.png [:db_insert_placeholder_5] => 1d37c01e3b1346cc3ac3dbf1280c3fd236c3f3433e1d44a4902066a9f3d87cbe [:db_insert_placeholder_6] => [:db_insert_placeholder_7] => 0) in aggregator_refresh() (line 640 of /home/ztiw7851207/public_html/modules/aggregator/aggregator.module).
如何解决这个问题？
编写有关站点设置一些意见 - 哪些模块你是否使用，是否是一个活的网站，你之前遇到过这样的问题，你有任何自定义模块等 –
自定义模块启用：Adsense模块，混沌工具，字段幻灯片，字段集合，Colorbox，CSS注入器，实体API，库，视图，视图UI，高级帮助。错误PDOException：SQLSTATE [23000]也在以前的Drupal版本中遇到过。警告'无法修改标题信息'是一个新问题。 Live [网站]（http://ow.ly/o3cJc）。 – triwo