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 ('83b9816a4ba0a60dd24bfb73c4b1f6bb', -1, 1713977047, 1713977047, '1275b6b3', -4, 0, 0)

Line : 187
File : sessions.php