"48 Hours" Episodes That are Updated Episodes of Older Episodes

I am currently updating some of the series and episodes of "48 Hours". There are numerous instances of a "new" episode actually being an old episode which is updated with new information, and as such it is not (usually) classed as a repeat in listings. What is the correct approach with these episodes - are they to be classed as separate episodes? I will add that many of these "updated" episodes already have their own entry, sometimes with "(Update)" or with "(II)" in the title. Some of them don't however.