[NEED HELP] How To Reduce Number of Mob Thief/Hunter spawn for trades

Dear experts, Me and my little brother are doing a private/lan server for our household, and it's kind of really hard for us to survive the army of thiefs spawning on 5* trades, what can we do to reduce number of thiefs/hunters spawned? or what section in Tab_RefNest table need to be changed?

You will need an extensive assembly knowledge to edit this, since it's hardcoded, not a database value.

Thanks, I made it another way around by changing the price & stacks of trade items.