### 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)

switch (type) {
					case CLASS:
						return m_class->start_line;
					case CONSTANT:
						return constant->start_line;
					case FUNCTION:
						return function->start_line;
					case VARIABLE:
						return variable->start_line;
					case ENUM_VALUE:
						return enum_value.line;
					case ENUM:
						return m_enum->start_line;
					case SIGNAL:
						return signal->start_line;
					case GROUP:
						return annotation->start_line;
					case UNDEFINED:
						ERR_FAIL_V_MSG(-1, "Reaching undefined member type.");
				}
				ERR_FAIL_V_MSG(-1, "Reaching unhandled type.");
			}
			DataType get_datatype() const {