The ruling on removing a sock for one who is in a state of ritual purity

Question:
If a person performs wudu' and wipes over a sock, then removes the sock some time after finishing the wudu', does the wudu' become invalid by removing the sock, or does it not?

Answer:
If one wipes over the sock after a state of ritual impurity, then removes it, the wudu' becomes invalid according to the majority of the scholars.
There is an anomalous opinion from some of the Tabi'un, but it is not the one relied upon.
The position of the majority of the scholars is that the wudu' becomes invalid if one removes the leather socks or the socks after wiping over them, having become in a state of ritual impurity before that. The wudu' becomes invalid, yes.

Question: Meaning, one does not suffice with washing the foot only?

Answer: No, he repeats the wudu', the entire wudu' from the beginning.