### Godot version

4.0.dev (c309de53997feff3286295fb2d71657f112a15db)

### System information

Linux, Nvidia, Vulkan

### Issue description

Editor segfaults when certain conditions are met when using the AnimationPlayer editor.

### Steps to reproduce

1. Create multiple animations, saved into a animation collection
2. Open an existing animation, then make a new empty animation
3. Change from seconds to fps, or add a new property to animate ()
4. Editor crashes

NOTE: It is slightly random and I have not found a perfect repro

### Minimal reproduction project

N/A (TBD?)
if (setting || animation != p_anim) {
		return;
	}
	notify_change();
}
void AnimationMultiTrackKeyEdit::_key_ofs_changed(const Ref<Animation> &p_anim, float from, float to) {
	if (animation != p_anim) {
		return;
	}
	for (const KeyValue<int, List<float>> &E : key_ofs_map) {
		int key = 0;
		for (const float &key_ofs : E.value) {
			if (from != key_ofs) {
				key++;
				continue;
			}
			int track = E.key;
			key_ofs_map[track][key] = to;
			if (setting) {
				return;
			}
			notify_change();
			return;
		}
	}
}
bool AnimationMultiTrackKeyEdit::_set(const StringName &p_name, const Variant &p_value) {