### 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?)
} else {
					continue;
				}
			}
			InsertData id;
			id.path = animation->track_get_path(i);
			id.track_idx = i;
			id.value = value;
			id.type = Animation::TYPE_BEZIER;
			id.query = vformat(TTR("property '%s'"), p_property);
			id.advance = false;
			
			_query_insert(id);
			inserted = true;
		}
	}
	if (inserted || p_only_if_exists) {
		return;
	}
	InsertData id;
	id.path = np;
	id.track_idx = -1;
	id.value = p_value;
	id.type = Animation::TYPE_VALUE;
	id.query = vformat(TTR("property '%s'"), p_property);
	id.advance = false;
	
	_query_insert(id);
}
void AnimationTrackEditor::insert_value_key(const String &p_property, const Variant &p_value, bool p_advance) {