phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4f5fe71070c0d8fbbda5c021d23fb2dc' 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 ('4f5fe71070c0d8fbbda5c021d23fb2dc', -1, 1769569406, 1769569406, 'd849d8d0', -4, 0, 0)

Line : 187
File : sessions.php