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TPS61041: If feedback resistance changes to high impedance, what's thing should consider?

Part Number: TPS61041

Hi team, 

Customer want to change the feedback resistance from R1=2.2M and R2=160k to R1=4.3M and R2=330k respectively, keeping same voltage =18V. 

What's the concern they should consider or is it acceptable in design or not? 

Regards, Naoki Yada