Fatal error: Duplicate entry '0' for key 2 query: INSERT INTO sessions (sid, uid, hostname, timestamp) VALUES ('e2ee6aefb6e21bc1d1fa92fd64304673', 0, '54.91.16.95', 1516690601) in /srv/www/htdocs/a2jauthor/drupal/includes/database.mysql.inc on line 66