Howto and if it is possible to reload the August data into your application depends a lot on your data sources? Does the data sources keep the history data so it is possible to recreate a identical data set two months later?
If it is possible, then you would most likely need to use or edit your WHERE clause when loading your application. Maybe You have a created date in your source data that you can use?
LOAD Fields FROM Source WHERE [Creation date] < '2021-09-01';
An alternative solution could be to use the qvw it self as a source using BINARY Load .
