### 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)

PREC_NONE,
		PREC_ASSIGNMENT,
		PREC_CAST,
		PREC_TERNARY,
		PREC_LOGIC_OR,
		PREC_LOGIC_AND,
		PREC_LOGIC_NOT,
		PREC_CONTENT_TEST,
		PREC_COMPARISON,
		PREC_BIT_OR,
		PREC_BIT_XOR,
		PREC_BIT_AND,
		PREC_BIT_SHIFT,
		PREC_ADDITION_SUBTRACTION,
		PREC_FACTOR,
		PREC_SIGN,
		PREC_BIT_NOT,
		PREC_POWER,
		PREC_TYPE_TEST,
		PREC_AWAIT,
		PREC_CALL,