phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ef4872ee2c6eff2ee47784f653ff3e6c' 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 ('ef4872ee2c6eff2ee47784f653ff3e6c', -1, 1762784383, 1762784383, 'd849d800', 0, 0, 0)

Line : 210
File : sessions.php