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) VALUES ('84f72fd5479ca656c1e2606d12c8666f', -1, 1714641871, 1714641871, '12df1505', -4, 0)

Line : 158
File : sessions.php