Liens on property while doing subject to deals

[Simon Stahl]

I was wondering how it works with the liens when I do a subject to existing mortgage deal. Here is where I see the problem: When I take over the sellers mortgage, this lien stays on the house even though the deed is now in my name. Later, when I want to sell the property again, how can the buyers get a mortgage for it when there is still the lien on it?