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 ('0a08d6760a6a2a8604333f01c2d8694a', -1, 1714005739, 1714005739, '12deb8a2', -10, 0, 0)

Line : 187
File : sessions.php