### 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 (animation->track_get_type(i) == Animation::TYPE_VALUE) {
			if (animation->track_get_path(i) != np) {
				continue;
			}
			InsertData id;
			id.path = np;
			id.track_idx = i;
			id.value = p_value;
			id.type = Animation::TYPE_VALUE;
			
			id.query = vformat(TTR("property '%s'"), p_property);
			id.advance = false;
			
			_query_insert(id);
			inserted = true;
		} else if (animation->track_get_type(i) == Animation::TYPE_BEZIER) {
			Variant value;
			String track_path = animation->track_get_path(i);
			if (track_path == np) {
				value = p_value; 
			} else {
				int sep = track_path.rfind(":");
				if (sep != -1) {
					String base_path = track_path.substr(0, sep);
					if (base_path == np) {
						String value_name = track_path.substr(sep + 1);
						value = p_value.get(value_name);
					} else {
						continue;
					}