An example is Neff-761. It was created in 2014 for Rev. Jacob Neff, b. 16 Feb. 1727, Germantown, PA, d. 16 Feb. 1814, Lancaster Co., PA. There wasn't much other information in the profile, but eventually the correct wife, Anna Brackbill, was added. In 2017, the parents of a different Jacob Neff (not a Rev.), with similar dates, were added, and then a detailed biography of this new Jacob (cut and pasted from FindAGrave) was included. A couple of years later, a new profile for the Rev. Jacob Neff was created (Neff-1756).
The easiest solution at this point, would have been to just leave the two profiles for the two Jacobs, modifying them as needed. Instead, I chose to
1. Revert the information in Neff-761 back to Rev. Jacob Neff.
2. Propose a merge of Neff-761 and Neff-1756.
3. Create a new profile for the second Jacob Neff (Neff-3764).
It was more work that way, but it seemed to be what the Wikitree rules require.