phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4daf5d41bbd94e27b2c024b724b0d43b' 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 ('4daf5d41bbd94e27b2c024b724b0d43b', -1, 1771047798, 1771047798, 'd849d88a', -4, 0, 0)

Line : 187
File : sessions.php