Budget Revision (Addition and Subtraction) on EPM source budget transferred to fusion.

We have EPM implementation in place and is the source for transferring the budget to fusion. The control budget is defined as type Hyperion Planning. The budget has been transferred and later in fusion there are some optimization (Addition and Subtraction) required. The Enter budget from spreadsheet worked for the revision although the source budget type is Hyperion Planning which i think has control deficiency. Anyway, we need to know is it suggested to do such changes and needs to know if we do the spreadsheet (Enter budget in Spreadsheet) will there be any further impact.