### 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 = IDENTIFIER;
		}
	};
	struct IfNode : public Node {
		ExpressionNode *condition = nullptr;
		SuiteNode *true_block = nullptr;
		SuiteNode *false_block = nullptr;
		IfNode() {
			type = IF;
		}
	};
	struct LambdaNode : public ExpressionNode {
		FunctionNode *function = nullptr;
		FunctionNode *parent_function = nullptr;
		Vector<IdentifierNode *> captures;
		HashMap<StringName, int> captures_indices;
		bool use_self = false;
		bool has_name() const {
			return function && function->identifier;
		}
		LambdaNode() {
			type = LAMBDA;
		}
	};
	struct LiteralNode : public ExpressionNode {
		Variant value;
		LiteralNode() {