Debit Note in GSTR-1

Hello Experts,

I am supplying material to one private limited company whose turnover in more than 50 Crore (Liable for E Invoice),

Now party returned some material and issued Debit Note and uploaded it as Debit Note on GST portal,

and also given me in instruction that i should issued credit note against this Debit Note.

My query is that while checking my auto populated GSTR-3B it shows me that my supplier issued Debit Note to me and it automatically reduced my ITC as pvt ltd company uploaded as Debit Note on GST portal,