### 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)

type = FOR;
		}
	};
	struct FunctionNode : public Node {
		IdentifierNode *identifier = nullptr;
		Vector<ParameterNode *> parameters;
		HashMap<StringName, int> parameters_indices;
		TypeNode *return_type = nullptr;
		SuiteNode *body = nullptr;
		bool is_static = false;
		bool is_coroutine = false;
		Variant rpc_config;
		MethodInfo info;
		LambdaNode *source_lambda = nullptr;
#ifdef TOOLS_ENABLED
		Vector<Variant> default_arg_values;
		String doc_description;
#endif 
		bool resolved_signature = false;
		bool resolved_body = false;
		FunctionNode() {
			type = FUNCTION;
		}
	};
	struct GetNodeNode : public ExpressionNode {
		String full_path;
#ifdef DEBUG_ENABLED
		bool use_dollar = true;
#endif
		GetNodeNode() {