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 ('1f457d9637fb7b368f5cdb29887e582e', -1, 1714040849, 1714040849, '03914a36', -11, 0, 0)

Line : 187
File : sessions.php