### 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?)
NodePath np = value;
	if (np == NodePath()) {
		return;
	}
	Node *root = EditorNode::get_singleton()->get_tree()->get_root();
	Node *np_node = root->get_node(np);
	ERR_FAIL_COND(!np_node);
	Node *edited_node = root->get_node(base);
	ERR_FAIL_COND(!edited_node);
	value = edited_node->get_path_to(np_node);
}
void AnimationTrackKeyEdit::_update_obj(const Ref<Animation> &p_anim) {
	if (setting || animation != p_anim) {
		return;
	}
	notify_change();
}
void AnimationTrackKeyEdit::_key_ofs_changed(const Ref<Animation> &p_anim, float from, float to) {
	if (animation != p_anim || from != key_ofs) {
		return;
	}
	key_ofs = to;
	if (setting) {
		return;
	}
	notify_change();
}
bool AnimationTrackKeyEdit::_set(const StringName &p_name, const Variant &p_value) {