LMR62421: Stability issue

Hello,

                 LMR62421 BOOST IC measure transient Response  0.35V~0.7V ,948mVp-p waveform as fallows Customer change PC201 to 2200p  and measure transient Response  0.35V~0.7V is 724mVp-p. 

While change this cap. what is the phase margin and has any risk for stability? Thank you. 

BR

Patrick