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 ('1815f9f51dd216747cfb585b727d92bc', -1, 1715008294, 1715008294, '12bc28cf', 7, 0, 0)

Line : 189
File : sessions.php