Cause
The cursor expired (24 hours in collections; the log retention for events).
What to do
Restart the traversal without a cursor.
application/problem+json
{
"type": "https://masnet.com/developers/errors/cursor_expired",
"title": "Cursor expired",
"status": 410,
"detail": "...",
"code": "cursor_expired",
"correlation_id": "..."
}