supplier data different from buyer

MOHAMMAD SAGHIR ADIL (108 Points)

04 October 2017  
my supplier sent me goods with invoice.
suppose with 1000 Rs IGST.

HE by mistake during his gstr1 he entered 1000.50 as igst

now there is a difference of 50paise.

how to adjust it.
coz i have already enteredt igst as 1000rs in form3b

guide me please.?