Adjustment of Credit note against RCM invoice

kanchan Ambavale (22 Points)

15 January 2020  
We have received RCM invoice in last month, we consider this invoice in gst return and paid gst RCM of Rs 5000/-

and next month we get credit note against this RCM invoice.of Rs. 2000/-

So, how we can adjust this credit note against already paid invoice.

Please suggest the accounting entries against this transaction.