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 ('aaf7f8a6fe0c9ea6d12faef43aa99954', -1, 1714400088, 1714400088, '0391a607', 8, 0)

Line : 158
File : sessions.php