### Godot version

v4.1.1-stable_mono_win64

### System information

Windows 11

### Issue description

I removed the node to replace it with another, but when I change the path in the code, the engine crashes for me.

### Steps to reproduce

I did a screen recording as it happens:

https://github.com/godotengine/godot/assets/116289408/b2fd2689-8d82-44e8-8e02-be01674842e1



### Minimal reproduction project

[MixApo.zip](https://github.com/godotengine/godot/files/12208403/MixApo.zip)

code_completion_base = string_to_complete;
	
	if (code_completion_base.is_numeric()) {
		cancel_code_completion();
		return;
	}
	int max_width = 0;
	String string_to_complete_lower = string_to_complete.to_lower();
	for (ScriptLanguage::CodeCompletionOption &option : code_completion_option_sources) {
		option.matches.clear();
		if (single_quote && option.display.is_quoted()) {
			option.display = option.display.unquote().quote("'");
		}
		int offset = option.default_value.get_type() == Variant::COLOR ? line_height : 0;
		if (in_string != -1) {
			String quote = single_quote ? "'" : "\"";
			option.display = option.display.unquote().quote(quote);
			option.insert_text = option.insert_text.unquote().quote(quote);
		}
		if (option.display.length() == 0) {
			continue;
		}
		if (string_to_complete.length() == 0) {
			option.get_option_characteristics(string_to_complete);
			code_completion_options.push_back(option);
			if (theme_cache.font.is_valid()) {
				max_width = MAX(max_width, theme_cache.font->get_string_size(option.display, HORIZONTAL_ALIGNMENT_LEFT, -1, theme_cache.font_size).width + offset);
			}
			continue;
		}