How to pass data back to previous screen in react native navigation v5?

I just updated to react native navigation version 5. Now I am trying to send data back to previous screen on goBack() call.

I push next view with

const onSelectCountry = item => {
    console.log(item);
};

navigation.navigate('SelectionScreen', {
        onSelect: onSelectCountry});

And making move back after selecting item from FlatList with call:

function onSelectedItem(item) {
    route.params.onSelect(item);
    navigation.goBack();
}

But by sending function over with params I get a warning: Non-serializable valuse were found in the navigation state...

Can someone please tell me correct way to do this.