phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1f1831f6c1747dc2932f0c1b9ed980e4' 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 ('1f1831f6c1747dc2932f0c1b9ed980e4', -1, 1743104905, 1743104905, '03951d78', 2, 0, 0)

Line : 187
File : sessions.php