### 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 = VARIABLE;
				variable = p_variable;
				name = p_variable->identifier->name;
				source_function = p_source_function;
				start_line = p_variable->start_line;
				end_line = p_variable->end_line;
				start_column = p_variable->start_column;
				end_column = p_variable->end_column;
				leftmost_column = p_variable->leftmost_column;
				rightmost_column = p_variable->rightmost_column;
			}
			Local(ParameterNode *p_parameter, FunctionNode *p_source_function) {
				type = PARAMETER;
				parameter = p_parameter;
				name = p_parameter->identifier->name;
				source_function = p_source_function;
				start_line = p_parameter->start_line;
				end_line = p_parameter->end_line;
				start_column = p_parameter->start_column;
				end_column = p_parameter->end_column;
				leftmost_column = p_parameter->leftmost_column;
				rightmost_column = p_parameter->rightmost_column;
			}
			Local(IdentifierNode *p_identifier, FunctionNode *p_source_function) {