### 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)

} else {
					gen->write_return(return_value);
				}
				if (return_value.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
					codegen.generator->pop_temporary();
				}
			} break;
			case GDScriptParser::Node::ASSERT: {
#ifdef DEBUG_ENABLED
				const GDScriptParser::AssertNode *as = static_cast<const GDScriptParser::AssertNode *>(s);
				GDScriptCodeGenerator::Address condition = _parse_expression(codegen, err, as->condition);
				if (err) {
					return err;
				}
				GDScriptCodeGenerator::Address message;
				if (as->message) {
					message = _parse_expression(codegen, err, as->message);
					if (err) {
						return err;
					}
				}
				gen->write_assert(condition, message);
				if (condition.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
					codegen.generator->pop_temporary();
				}
				if (message.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
					codegen.generator->pop_temporary();
				}
#endif
			} break;