> It was obviously an error because the building used to be a military facility

It is obvious to you because you want to believe it. It is not obvious to me at all. Here are my reasons.

I find it very hard to believe that they have not updated their map in the last 10-15 year of a country that (i) both the US and Israel have been itching to bomb for multiple decades and (ii) is riddled with HUMINT.

Israel's history of knowingly bombing schools in the past (in Egypt) certainly does not help the case.

https://en.wikipedia.org/wiki/Bahr_El-Baqar_primary_school_b...

The pilot later went on to claim that this was deliberate.

   April 1970, Israeli Phantom
   fighter jets bombed the Bahr 
   al-Baqar elementary school in
   Egypt’s Sharqia governorate,
   killing 46 children out of 130
   who were in their classrooms
   that morning.

   Israel claimed the school was
   an Egyptian military facility,
   and Defense Minister Moshe
   Dayan said at the time that
   “the Egyptians may have put
   elementary school pupils in
   a military base".

   But an Israeli pilot who took
   part in the raid and was
   captured during the
   October 1973 war later
   revealed it had been a
   deliberate attack and that
   they knew it was merely a
   school.

Given the repetition, it smells target selection policy to me rather than an accident.

These kids would have been kids of IRGC personnel. Likely that was the reason.