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 ('0e868b5c1ae91886b96e2c7868b2fc9a', -1, 1714692915, 1714692915, '030fe571', -9, 0)

Line : 158
File : sessions.php