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 ('518e7fed3652be3fa78c0d10116da747', -1, 1713996876, 1713996876, '0387be65', -7, 0, 0)

Line : 187
File : sessions.php