phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a6f51a487331d9a9f967ef1f8a0c138d' for key 1

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('a6f51a487331d9a9f967ef1f8a0c138d', -1, 1714937641, 1714937641, '12dd2aa4', 0, 0, 0)

Line : 187
File : sessions.php