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 ('9d465b6a0e3a3c85418571ac1b8e8773', -1, 1713456407, 1713456407, '12df6a64', -9, 0, 0)

Line : 187
File : sessions.php