killing fragment observing live-data instance in a shared view model - viewmodel

Question

I am using shared view model to get values from socket across an activity, with help of observing a live-data instance, and navigation component to navigate between fragments so there's a situation where i show a payment receipt value then user clicks pay this fragment should navigate to another fragment and destroy the first one but what's actually happening it's still alive due to shared view model live-data instance that i was observing, so how to kill this fragment instance when navigating to another fragment
so first i was in trip status -> payment -> thanks
here's my navigation code
private fun updateTripStatusUI(isPayed: Boolean = false) {
if (isPayed) {
findNavController(R.id.navigationFragment).popBackStack()
findNavController(R.id.navigationFragment).navigate(
TripStatusFragmentDirections.actionTripStatusFragmentToThanksFragment()
)
} else
findNavController(R.id.navigationFragment).navigate(TripStatusFragmentDirections.actionGlobalPaymentFragment())
}
and here's my graph
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/trip_graph"
app:startDestination="#id/tripStatusFragment">
<fragment
android:id="#+id/tripStatusFragment"
android:name="package.TripStatusFragment"
android:label="fragment_trip_status"
tools:layout="#layout/fragment_trip_status">
<action
android:id="#+id/action_tripStatusFragment_to_thanksFragment"
app:destination="#id/thanksFragment"
app:enterAnim="#anim/nav_default_enter_anim"
app:exitAnim="#anim/nav_default_exit_anim"
app:popEnterAnim="#anim/popup_enter"
app:popExitAnim="#anim/popup_exit" />
</fragment>
<fragment
android:id="#+id/paymentFragment"
android:name="package.PaymentFragment"
android:label="PaymentFragment"
tools:layout="#layout/fragment_payment" />
<fragment
android:id="#+id/thanksFragment"
android:name="package.ThanksFragment"
android:label="ThanksFragment"
tools:layout="#layout/fragment_thanks" />
<action
android:id="#+id/action_global_paymentFragment"
app:destination="#id/paymentFragment"
app:enterAnim="#anim/nav_default_enter_anim"
app:exitAnim="#anim/nav_default_exit_anim"
app:popEnterAnim="#anim/nav_default_pop_enter_anim"
app:popExitAnim="#anim/nav_default_pop_exit_anim" />
</navigation>
and in ThanksFragment i navigate back to TripStatusFragment with this line
findNavController().navigate(R.id.tripStatusFragment)