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 ('ffddea84c59de28da8bd81122f9db6e0', -1, 1730414834, 1730414834, '038b61a1', 35, 0, 0)

Line : 195
File : sessions.php