phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'aa4feb628d4e5f97a783f24c91c0979e' 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 ('aa4feb628d4e5f97a783f24c91c0979e', -1, 1762247860, 1762247860, 'd849d8a1', 2, 0, 0)

Line : 187
File : sessions.php