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 ('0b727a0fd2bffb9b84d0d1736c9c449d', -1, 1715313715, 1715313715, '12daacf9', -8, 0, 0)

Line : 189
File : sessions.php