phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1476369055e2d201999e23219d381c3b' 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 ('1476369055e2d201999e23219d381c3b', -1, 1772080832, 1772080832, 'd849d879', 1, 0, 0)

Line : 187
File : sessions.php