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 ('f4adcb1735e663702684c4be62f1c84a', -1, 1713566937, 1713566937, '03163df6', 0, 0, 0)

Line : 187
File : sessions.php