ACL und Rules Module

PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '24496-32890-acl' for key 'PRIMARY': INSERT INTO {node_access} (nid, realm, gid, grant_view, grant_update, grant_delete) 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, :db_insert_placeholder_8, :db_insert_placeholder_9, :db_insert_placeholder_10, :db_insert_placeholder_11), (:db_insert_placeholder_12, :db_insert_placeholder_13, :db_insert_placeholder_14, :db_insert_placeholder_15, :db_insert_placeholder_16, :db_insert_placeholder_17); Array ( [:db_insert_placeholder_0] => 24496 [:db_insert_placeholder_1] => acl [:db_insert_placeholder_2] => 32890 [:db_insert_placeholder_3] => 1 [:db_insert_placeholder_4] => 0 [:db_insert_placeholder_5] => 0 [:db_insert_placeholder_6] => 24496 [:db_insert_placeholder_7] => acl [:db_insert_placeholder_8] => 32891 [:db_insert_placeholder_9] => 0 [:db_insert_placeholder_10] => 1 [:db_insert_placeholder_11] => 0 [:db_insert_placeholder_12] => 24496 [:db_insert_placeholder_13] => content_access_rid [:db_insert_placeholder_14] => 3 [:db_insert_placeholder_15] => 1 [:db_insert_placeholder_16] => 0 [:db_insert_placeholder_17] => 0 ) in node_access_write_grants() (Zeile 3555 von /var/www/modules/node/node.module).