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 ('7d7c41899d051a5833a3e78e2ea9ca18', -1, 1713952697, 1713952697, '0315f82f', -4, 0, 0)

Line : 187
File : sessions.php