Are you committing the import .import files? These contain the import settings for assets, as well as the uids the engine assigned to them.

Just pop them into regex101 or a similar tool, add sample data, see the mistake, fix the mistake, continue to do other stuff.

If you are interested in open street maps, then you might want to check out the StreetComplete app. It will give you various quests to complete and achievements to unlock.

If you come from rust you might want to consider using https://godot-rust.github.io