phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ef7d440ff84a9f012bdf67dce0fb69e6' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('ef7d440ff84a9f012bdf67dce0fb69e6', -1, 1769445850, 1769445850, 'd849d814', -4, 0, 0)

Line : 187
File : sessions.php