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 ('16f48a1b803a292a3a7c7fc59229829c', -1, 1713576919, 1713576919, '0316b5d1', -4, 0, 0)

Line : 187
File : sessions.php