### 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)

OP_ADDITION,
			OP_SUBTRACTION,
			OP_MULTIPLICATION,
			OP_DIVISION,
			OP_MODULO,
			OP_POWER,
			OP_BIT_LEFT_SHIFT,
			OP_BIT_RIGHT_SHIFT,
			OP_BIT_AND,
			OP_BIT_OR,
			OP_BIT_XOR,
			OP_LOGIC_AND,
			OP_LOGIC_OR,
			OP_CONTENT_TEST,
			OP_COMP_EQUAL,
			OP_COMP_NOT_EQUAL,
			OP_COMP_LESS,
			OP_COMP_LESS_EQUAL,
			OP_COMP_GREATER,
			OP_COMP_GREATER_EQUAL,
		};
		OpType operation = OpType::OP_ADDITION;
		Variant::Operator variant_op = Variant::OP_MAX;
		ExpressionNode *left_operand = nullptr;
		ExpressionNode *right_operand = nullptr;
		BinaryOpNode() {