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 ('1483469717e0ea0a44c8c63d1f233e8c', -1, 1715111686, 1715111686, '038b4e95', 7, 0, 0)

Line : 189
File : sessions.php