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 ('72a66148e8ecd0d118a7753b4939d9a1', -1, 1713556722, 1713556722, '0387d9e4', -9, 0, 0)

Line : 187
File : sessions.php