What is the legal effect of a master pardoning a Mukatab (contracted slave) from the entire amount due for manumission?

Primary text

If the master absolves the Mukatab from the debt of *kitabah* (manumission contract), the Mukatab is freed and manumitted. This is because his liability concerning the *kitabah* money is extinguished, making it analogous to having paid the amount. This ruling is established because absolution is treated the same as fulfillment.