What are these kuids? They show up as unknown on a route that I'm installing

[Od19]

I'm porting over a route I had on another hard drive, while downloading missing assets, I came across these unknown assets

<kuid2:45324:100010:2>
<kuid:521835:100162>
<kuid2:523:10114:5>
<kuid:473973:1114>
<kuid:521835:100114>
<kuid:521835:100191>
<kuid2:523:10070:1>
<kuid:521835:100165>
<kuid2:45324:100140:2>
<kuid:-25:752>
<kuid2:30501:1005:2>
<kuid:521835:100021>

 

[frogpipe]

I'm porting over a route I had on another hard drive, while downloading missing assets, I came across these unknown assets

In TS2019 Platinum,

<kuid2:45324:100010:2> UP Heritage SP SD70ACe - Not listed, author NorfolkSouthern37, probable "included" asset from earlier version
<kuid:-25:752> Power Station - Package, Payware, author Auran
<kuid2:30501:1005:2> Station Wallangarra - Packaged, author Auran

I'd be the rest are also from earlier versions of Trainz, tho I can't identify them.