### 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)

case GDScriptParser::DictionaryNode::LUA_TABLE:
						
						StringName key = dn->elements[i].key->reduced_value.operator StringName();
						element = codegen.add_constant(key);
						break;
				}
				elements.push_back(element);
				element = _parse_expression(codegen, r_error, dn->elements[i].value);
				if (r_error) {
					return GDScriptCodeGenerator::Address();
				}
				elements.push_back(element);
			}
			gen->write_construct_dictionary(result, elements);
			for (int i = 0; i < elements.size(); i++) {
				if (elements[i].mode == GDScriptCodeGenerator::Address::TEMPORARY) {
					gen->pop_temporary();
				}
			}
			return result;
		} break;
		case GDScriptParser::Node::CAST: {
			const GDScriptParser::CastNode *cn = static_cast<const GDScriptParser::CastNode *>(p_expression);
			GDScriptDataType cast_type = _gdtype_from_datatype(cn->get_datatype(), codegen.script);
			GDScriptCodeGenerator::Address result;
			if (cast_type.has_type) {
				
				result = codegen.add_temporary(cast_type);
				GDScriptCodeGenerator::Address src = _parse_expression(codegen, r_error, cn->operand);
				gen->write_cast(result, src, cast_type);