phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1fddcccacfe65642b30f45e8fd9244ba' 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 ('1fddcccacfe65642b30f45e8fd9244ba', -1, 1770430619, 1770430619, 'd849d821', 4, 0, 0)

Line : 187
File : sessions.php