### 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)

locals_indices[p_local->identifier->name] = locals.size();
			locals.push_back(Local(p_local, p_source_function));
		}
		void add_local(const Local &p_local) {
			locals_indices[p_local.name] = locals.size();
			locals.push_back(p_local);
		}
		SuiteNode() {
			type = SUITE;
		}
	};
	struct TernaryOpNode : public ExpressionNode {
		
		ExpressionNode *condition = nullptr;
		ExpressionNode *true_expr = nullptr;
		ExpressionNode *false_expr = nullptr;
		TernaryOpNode() {
			type = TERNARY_OPERATOR;
		}
	};
	struct TypeNode : public Node {
		Vector<IdentifierNode *> type_chain;
		TypeNode *container_type = nullptr;
		TypeNode() {