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 ('1e5c21a54f90b6dc80a2bad2db9d49a3', -1, 1711688850, 1711688850, '2cd35b17', -7, 0, 0)

Line : 187
File : sessions.php