@AMinakov Look back window would be one of the reasons, for this. Below
are some points you would need to keep in mind Sub-classifications are
not supported with Classification Rule Builder (CRB). Our current
classification system can only export up to 10 million rows at a time.
When CRB requests an export, it pulls both classified AND unclassified
values, with unclassified values coming through at the end of the
export. This means that, over time, you could fill up 10 million
classified values ...