No, the problem was that there was no need for coins in the local bartering system of the time. Even into the late 1800s Joseon had issues where almost all mass transport relied on the rivers, even most of such transport being tribute and tax to the central government. There literally was no incentive to proceed with coinage at this point in time. Furthermore, thisa is what happens when you punch out coins without the economy to sustain usage.
Then I guess we can just omit it, if it isn't essential for the economy (until peace-time, I'd assume).