If socks are removed after being worn following an ablution, is it obligatory to repeat the entire ablution or merely wash the feet?

The ruling on the invalidation of ablution (wudu') by removing the sock differs depending on the type of ablution. If the ablution included washing the feet, then removing the sock does not cause harm. However, if the ablution was performed by wiping over the socks and then they were removed before the expiration of the wiping period, there is a difference of opinion among scholars on this issue.