### 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)

if (ResourceLoader::get_resource_type(global_class_path) == "GDScript") {
						Error err = OK;
						res = GDScriptCache::get_full_script(global_class_path, err);
						if (err != OK) {
							_set_error("Can't load global class " + String(identifier), p_expression);
							r_error = ERR_COMPILATION_FAILED;
							return GDScriptCodeGenerator::Address();
						}
					} else {
						res = ResourceLoader::load(global_class_path);
						if (res.is_null()) {
							_set_error("Can't load global class " + String(identifier) + ", cyclic reference?", p_expression);
							r_error = ERR_COMPILATION_FAILED;
							return GDScriptCodeGenerator::Address();
						}
					}
				}
				return codegen.add_constant(res);
			}
#ifdef TOOLS_ENABLED
			if (GDScriptLanguage::get_singleton()->get_named_globals_map().has(identifier)) {
				GDScriptCodeGenerator::Address global = codegen.add_temporary(); 
				gen->write_store_named_global(global, identifier);
				return global;
			}
#endif
			
			_set_error("Identifier not found: " + String(identifier), p_expression);
			r_error = ERR_COMPILATION_FAILED;
			return GDScriptCodeGenerator::Address();