The upvotes haven't been lost, they've just been migrated along with the post. Your answer on Drones.SE still has 4 upvotes, and your Drones.SE account has accordingly been given 40 rep.

@F1Krazy: thanks for your answer. So they are kept separated?

Yes. Migration deletes the answers on the old site, and you (generally) don't earn reputation for deleted posts. Nor is there any way to get them back, unless the migration is rejected on the Drones side/site.

Thanks for the answer and sorry for the stupid question: shall I delete it?

As far as deleting the question, it's up to you. Duplicates aid users searching for answers, and it can be hard to dig through a large FAQ post.

The migration here was indeed incorrect as you note, as it violates two principles listed in the migration FAQ: don't migrate questions that aren't a bad fit on the origin site and don't migrate answered questions unless they're at risk of being deleted on the origin site. I'd recommend raising this in an Aviation Meta post.

@SonictheAnonymousHedgehog I would like to know on what you are basing your assertion that those principles were violated, particularly the first, given that there were multiple people that voted to close it as "Not suitable for this site".

@Federico Keep in mind that migration votes are internally considered votes for that reason, which is why your mod tools may be showing them as such. For the first principle, I was going off of DeltaLima's comment stating it's not off-topic, and Max's response to that comment says they're voting to migrate simply because it's a better fit on Drones. Both those comments were posted before it got migrated.

The third and fourth bullets in the migration FAQ state the principles I cite clearly.

This should be used to give the answer, I suppose, and I never get to the green answer. 🖖

@SonictheAnonymousHedgehog the question got closed, reopened and was being closed again. If you don't have the information, please refrain from giving faulty advice.

@Federico Even if that principle doesn't apply here, the other principle against migrating answered questions does apply here. I did see another comment stating that it may be unclear, and if that's so then another principle applies, that questions that should be closed for a general, network-wide reason shouldn't be migrated. That said, can you please walk me through the first flowchart in the migration FAQ and explain how you get to the green path? Due to the positively-scored answer it at best leads to the orange path.

@Federico short premise: I truly don't care where this Q/A should be. Anyway the fact that it was closed and reopened implies that it was not that clear where that question should have been and therefore (according to the decision tree) it should have stayed where it was

@SonictheAnonymousHedgehog 1. I did not migrate. 2. personally I disagree about not migrating good answers, to me it is not a good reason to prevent getting better answers 3. all the close votes were about it being off-topic, a comment saying that it is not clear holds less weigth

@SonictheAnonymousHedgehog: I updated my question on meta.aviation linking also your community wiki 🖖

@SonictheAnonymousHedgehog: can you please move these comments to a chat? I'd like to delete this question of mine. Thanks in advance

@sophit I don't think he can, the trigger is having several comments only between two users, however there are more users commenting here. Only a moderator can move the comments to chat, so feel free to flag your question asking for that. Here on MSE the mods respond quickly so you should be fine. :)

@ShadowTheKidWizard: done, thanks for your help 🍻 (Oktoberfest time)