GSTR-1 Wrong Filed

Dear sir,
As our Dec'21 GSTR-1 we filed one invoice wrongly tick Supply attract Reverse Charge. In Jan'22 Amendment as same as above and filed.
On March we make the Regular invoice with same value to our Customer and that month One Credit note raised against for Dec'21 bill as Regular Invoice type. So, On March GSTR-1 filing above both invoice as a Contra.Further On Jun we Amended that Credit note with selected as Supply attract Reverse Charge.
My Doubt is Now Our Customer is eligible to take ITC od March Bill or Not?
Kindly Suggest...

Thank you