Supplier invoice date is later than my sale date

i bought 100 items from a supplier on 8 March and then i sell those items items to another buisness buyer on 15 march. i filed gstr1 and showed invoice of selling of 100 items on 15 march... but when my supplier filed gstr1 he shown date of sale of products to me  as 31 march. i sold something which i bought 15 days later in papers.. what to do? can it create problems for me...how this can be corrected as we both filed GSTR1.....