It would be pretty tough to find where Wisking-1 through 5 went to. I can speculate, but it would be idle speculation, unfortunately. Without having someone in a technical role get into the guts of the databases, there's no way to be sure.
But for example, if someone entered their family, and their LNAB was "WISHING", and they accidentally put their entries in as "WISKING" - then they merged these with 5 others out there, the original WISKING-1 through 5 would disappear and would become "WISHING-43, 47, 49, 56 and 62" (again, for example). So all I can guess is that someone merged these entries away at some point in the past. Note that Wisking-6 appears to be the first created and still existing WISKING profile, and it was created on 1 March 2014 (by a member who is no longer on WikiTree, unfortunately). :)
And because it was done with a GEDCOM import and the file no longer exists, there's not an easy way to see what profiles were imported first or last in the change log. Not sure if any of this is any help...