### Godot version

4.1.dev (a7276f1ce0)

### System information

MacOS 13.3 M1 Pro

### Issue description

when doing a Batch rename with two nodes being present in a `NodePath`. Batch Rename will try to update the `NodePath` but will fail which will results in this error
<img width="515" alt="Capture d’écran 2023-04-14 à 23 59 02" src="https://user-images.githubusercontent.com/66184050/232161972-57b49435-7707-4e41-bfed-613b073477b7.png">


### Steps to reproduce

1. Open the minimal reproduction project or follow the instruction below:
    1. first reproduce the following tree (this is because of #76069) <img width="235" alt="Capture d’écran 2023-04-14 à 23 09 47" src="https://user-images.githubusercontent.com/66184050/232155382-da3f9e22-26fb-4e10-bdcb-07cb60c25ea1.png">
    2. add a script to the root and export a `NodePath` variable
    3. Set the exported variable to the `GrandChild` node
4. select all node except the root.
5. Batch rename `C` to `T` for example
6. Inspect the root node. You should have a broken `NodePath` and an error.

### Minimal reproduction project

[test1.zip](https://github.com/godotengine/godot/files/11237175/test1.zip)
int style_id = opt_style->get_selected();
	String result = subject;
	if (style_id == 1) {
		
		result = result.to_snake_case();
		result = _regex("_+", result, "_");
	} else if (style_id == 2) {
		
		RegEx pattern("_+(.?)");
		Array matches = pattern.search_all(result);
		
		if (matches.size() && result != "_") {
			String buffer;
			int start = 0;
			int end = 0;
			for (int i = 0; i < matches.size(); ++i) {
				start = ((Ref<RegExMatch>)matches[i])->get_start(1);
				buffer += result.substr(end, start - end - 1);
				buffer += result.substr(start, 1).to_upper();
				end = start + 1;
			}
			buffer += result.substr(end, result.size() - (end + 1));
			result = buffer.to_pascal_case();
		}
	}
	int case_id = opt_case->get_selected();
	if (case_id == 1) {
		
		result = result.to_lower();