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 ('d8f339f195cf1fd81d578d5c0d2d4f17', -1, 1730415665, 1730415665, '12761494', 19, 0, 0)

Line : 195
File : sessions.php