phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4c9c1412c3d04e52052675da4b3fef9c' 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 ('4c9c1412c3d04e52052675da4b3fef9c', -1, 1758128033, 1758128033, 'd849d821', 16, 0, 0)

Line : 187
File : sessions.php