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 ('806e1ad430ed08973d6fb1bb5fe61825', -1, 1748037781, 1748037781, '0395f77b', -4, 0, 0)

Line : 189
File : sessions.php