phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c9566831a642b30df50ef6e8d44af42e' 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 ('c9566831a642b30df50ef6e8d44af42e', -1, 1761383899, 1761383899, 'd849d835', -4, 0, 0)

Line : 187
File : sessions.php