### Godot version

4.0.dev

### System information

win11，core i7 13700,  GTX4090

### Issue description

Just look at this gif.

![screenshots](https://user-images.githubusercontent.com/1620585/225354749-6ea17059-95b2-45e0-9765-8505e92726eb.gif)

It seems that it was block by Static Type Checking.

![image](https://user-images.githubusercontent.com/1620585/225362874-507ff0ec-c6d8-4a25-9a16-89db1885ad02.png)

If it's right.

Why it doesn't just disable other option except for String and StringName?

### Steps to reproduce

1. first select string type
2. input a text
3. change type
4. change back to string  -- it don't work
5. change to stringname -- it works
6. change back to string -- it works

### Minimal reproduction project

I think it don't need reproduction project.
if (key_edit) {
		memdelete(key_edit);
	}
	if (multi_key_edit) {
		memdelete(multi_key_edit);
	}
}
void AnimationTrackKeyEditEditor::_time_edit_entered() {
	int key = animation->track_find_key(track, key_ofs, Animation::FIND_MODE_APPROX);
	if (key == -1) {
		return;
	}
	key_data_cache.time = animation->track_get_key_time(track, key);
	key_data_cache.transition = animation->track_get_key_transition(track, key);
	key_data_cache.value = animation->track_get_key_value(track, key);
}
void AnimationTrackKeyEditEditor::_time_edit_exited() {
	real_t new_time = spinner->get_value();
	if (use_fps) {
		real_t fps = animation->get_step();
		if (fps > 0) {
			fps = 1.0 / fps;
		}
		new_time /= fps;
	}
	if (Math::is_equal_approx(new_time, key_data_cache.time)) {
		return; 
	}
	int existing = animation->track_find_key(track, new_time, Animation::FIND_MODE_APPROX);
	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();