phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('c40b79e53ad878d938c796ee88cae47d', -1, 1713599590, 1713599590, '12de6c12', -8, 0, 0)

Line : 187
File : sessions.php