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 ('c4dff91999d17b0aba1d90d2ef1d4550', -1, 1713938867, 1713938867, '03889a67', -4, 0, 0)

Line : 187
File : sessions.php