phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '2d1ba69a8bb0a02772fa4594a562c46a' for key 1

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('2d1ba69a8bb0a02772fa4594a562c46a', -1, 1409596517, 1409596517, '36502a17', -1, 0, 0)

Line : 187
File : sessions.php