phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'e61f4a95efd0a967c0807de25edfe978' 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 ('e61f4a95efd0a967c0807de25edfe978', -1, 1419012651, 1419012651, '3693c49f', -1, 0, 0)

Line : 292
File : sessions.php