### 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)

NONE,
			ANNOTATION,
			ARRAY,
			ASSERT,
			ASSIGNMENT,
			AWAIT,
			BINARY_OPERATOR,
			BREAK,
			BREAKPOINT,
			CALL,
			CAST,
			CLASS,
			CONSTANT,
			CONTINUE,
			DICTIONARY,
			ENUM,
			FOR,
			FUNCTION,
			GET_NODE,
			IDENTIFIER,
			IF,
			LAMBDA,