Payment not paid within 180 days ITC reversal

Decrease the in ITC and pay interest...

3) reverse the credit and pay interest

Rule 37 of cgst rules 2017 reads as under:
37. Reversal of input tax credit in the case of non-payment of consideration.-(1)A
registered person, who has availed of input tax credit on any inward supply of goods or
services or both, but fails to pay to the supplier thereof, the value of such supply along
with the tax payable thereon, within the time limit specified in the second proviso to
sub-section(2) of section 16, shall furnish the details of such supply, the amount of value
not paid and the amount of input tax credit availed of proportionate to such amount not
paid to the supplier in FORM GSTR-2 for the month immediately following the period
of one hundred and eighty days from the date of the issue of the invoice.
And sub rule 2 of rule 37 says that same shall be added to the output tax liability for the immediate next month in which limit of 180 days ecceeds

As per my understanding of the above