Why not abolish this pact when the ROK is the only one following it:

North Korea’s recent missile launches are widely viewed as a prelude to a seventh nuclear test and South Korea is exploring various response measures to deal with additional provocations. One of the measures being mentioned is scrapping the 2018 inter-Korean comprehensive military agreement which calls on the two Koreas to cease “hostile activities” against each other, including military exercises near the inter-Korean border.
Korea Times
Conservatives are urging Seoul to consider pulling out of the agreement, which they claim restrains South Korea’s defense capabilities by limiting military exercises and reconnaissance activities.
“We should declare the scrapping of the military agreement if North Korea carries out a seventh nuclear weapon test,” Ruling People Power Party (PPP) interim leader Rep. Chung Jin-suk wrote on Facebook on Friday, a day after the North deployed 12 military aircraft for an air strike drill.
“If we destroy the pact, our military’s flight boundaries and firing exercise zones in the East and West seas will expand, bolstering our capabilities in surveilling North Korea and deterrence firepower,” Chung added.
You can read more at the link.