### 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)

struct PatternNode;
	struct PreloadNode;
	struct ReturnNode;
	struct SelfNode;
	struct SignalNode;
	struct SubscriptNode;
	struct SuiteNode;
	struct TernaryOpNode;
	struct TypeNode;
	struct TypeTestNode;
	struct UnaryOpNode;
	struct VariableNode;
	struct WhileNode;
	class DataType {
	private:
		
		DataType *container_element_type = nullptr;
	public:
		enum Kind {
			BUILTIN,
			NATIVE,
			SCRIPT,
			CLASS, 
			ENUM, 
			VARIANT, 
			RESOLVING, 
			UNRESOLVED,
		};
		Kind kind = UNRESOLVED;
		enum TypeSource {