phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('92f6d8700b731a86b9a49f6e1e38f9c9', -1, 1715300686, 1715300686, '0315e7f5', -9, 0, 0)

Line : 189
File : sessions.php