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 ('3ff4ecc1da5116c8ed064f69b7d503b3', -1, 1713902732, 1713902732, '12776b60', -11, 0, 0)

Line : 187
File : sessions.php