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 ('3fe9f6e5849f4ec8c5947e9d11f2d9ce', -1, 1713584652, 1713584652, '12de7378', 0, 0, 0)

Line : 187
File : sessions.php