phpBB : Критическая ошибка

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c4d1af8e0b6890336c2c2c70606d35b9' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('c4d1af8e0b6890336c2c2c70606d35b9', -1, 1512977455, 1512977455, '36e2ac1e', -4, 0, 0)

Line : 187
File : sessions.php