Reject "Bust Execution"

Imported from previous forum

[ original email was from Vivien Lee - vivien.wm.lee@ing-barings.com ]
If sell side “bust execution” (Execution correction), and buy-side doesn’t like the modified qty or price. can buy-side reject this particular “Bust execution”? if yes, what is the proper message tag that we send in FIX 4.0?

Thanks in advance,