SystemFormBase in Dynamics 365 Customer Engagement

Hi,

I have 3 environments (Développement, Staging and Production). The three are in V 9.1.0.643 and obviously the production instance contains more data than the other two. I discovered that the entity SystemFormBase occupies more space in development and staging instances than in production one in a ratio of 1 to 10. I do not understand why and what is possible to do to save storage space.

Best regards.

Youcef