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 ('3fb38c35e34c9fa4641e0e51da9e783a', -1, 1714605390, 1714605390, '03915ddd', -4, 0, 0)

Line : 187
File : sessions.php