This was done on SimplyTest.me with the Devel module added:
Drupal\Core\Database\DatabaseExceptionWrapper: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''1373704617', '0', '1373704617')' at line 1: INSERT INTO {forum_index} (nid, title, tid, sticky, created, comment_count, last_comment_timestamp) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, , :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6); Array ( [:db_insert_placeholder_0] => 207 [:db_insert_placeholder_1] => Rusticus [:db_insert_placeholder_2] => 1 [:db_insert_placeholder_4] => 1373704617 [:db_insert_placeholder_5] => 0 [:db_insert_placeholder_6] => 1373704617 ) in Drupal\Core\Database\Connection->query() (line 571 of /home/s4465d8fbc820c87/www/core/lib/Drupal/Core/Database/Connection.php).
Drupal\Core\Entity\EntityStorageException: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''1373704617', '0', '1373704617')' at line 1: INSERT INTO {forum_index} (nid, title, tid, sticky, created, comment_count, last_comment_timestamp) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, , :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6); Array ( [:db_insert_placeholder_0] => 207 [:db_insert_placeholder_1] => Rusticus [:db_insert_placeholder_2] => 1 [:db_insert_placeholder_4] => 1373704617 [:db_insert_placeholder_5] => 0 [:db_insert_placeholder_6] => 1373704617 ) in Drupal\Core\Entity\DatabaseStorageControllerNG->save() (line 404 of /home/s4465d8fbc820c87/www/core/lib/Drupal/Core/Entity/DatabaseStorageControllerNG.php).