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 ('3c82d781ea4da52af68957d3d5fce5bc', -1, 1711633484, 1711633484, '03516125', -4, 0, 0)

Line : 187
File : sessions.php