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 ('62aa6b4d6c53ca060a7e0896757c0f60', -1, 1720359625, 1720359625, '0391ab85', 24, 0, 0)

Line : 187
File : sessions.php