High School Lot Stuck on Generic Type

I bulldozed and placed a new build from the gallery on the high school lot in Copperdale, and usually when I’ve done this in the past, it would make the lot details temporarily appear as “generic”, then if I exited to manage worlds and came back, it would change back to the High School lot type and it would be fine. 

This time, when I exited and came back, the lot type was stuck on ‘generic’, and the bar was greyed out so I couldn’t change it. 

I tried having a random sim travel to the lot and buy it as a retail store and then sell it, but it didn’t change anything other than make the bar clickable again - the only option was now retail.

So I placed the High School lot again, and it changed back to ‘general’, the bar was clickable still but there were no other lot type options. So I did what I usually do to see if it fixed itself, but when I exited to manage worlds and came back, the lot type stayed as ‘generic’ and it was greyed out again. 

I change my high school builds with every new generation since I got HSY, and this problem has only happened this once.