### Godot version

4.1.0

### System information

Windows 10, i711800H, Forward+ Vulkan

### Issue description

When using @export_group("Name") in a BaseClass, then inheriting from that BaseClass in another class and there also using @export_group("Name"), with the same group name, then running the project and re-saving the inherited class the project crashes with 
```
ERROR: FATAL: Index p_index = 3 is out of bounds (size() = 3).
   at: get (./core/templates/cowdata.h:155)
```

sometimes the editor crashes too after a while.

### Steps to reproduce

1. open reproduction project
2. Run the project.
3. Open the "super"script
4. Press CTRL + S to save it.

### Minimal reproduction project

[MRP_.zip](https://github.com/godotengine/godot/files/12137412/MRP_.zip)

UNDETECTED, 
			INFERRED, 
			ANNOTATED_EXPLICIT, 
			ANNOTATED_INFERRED, 
		};
		TypeSource type_source = UNDETECTED;
		bool is_constant = false;
		bool is_read_only = false;
		bool is_meta_type = false;
		bool is_pseudo_type = false; 
		bool is_coroutine = false; 
		Variant::Type builtin_type = Variant::NIL;
		StringName native_type;
		StringName enum_type; 
		Ref<Script> script_type;
		String script_path;
		ClassNode *class_type = nullptr;
		MethodInfo method_info; 
		HashMap<StringName, int64_t> enum_values; 
		_FORCE_INLINE_ bool is_set() const { return kind != RESOLVING && kind != UNRESOLVED; }