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 ('da5440056d5da399d9f158a8f0841b5a', -1, 1714023984, 1714023984, '0390248d', -4, 0, 0)

Line : 187
File : sessions.php