### 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)

while (scr) {
											if (scr->static_variables_indices.has(var_name)) {
												is_member_property = true;
												is_static = true;
												const GDScript::MemberInfo &minfo = scr->static_variables_indices[var_name];
												member_property_setter_function = minfo.setter;
												member_property_has_setter = member_property_setter_function != StringName();
												member_property_is_in_setter = member_property_has_setter && member_property_setter_function == codegen.function_name;
												static_var_class = codegen.add_constant(scr);
												static_var_index = minfo.index;
												static_var_data_type = minfo.data_type;
												break;
											}
											scr = scr->_base;
										}
									}
								}
							}
							break;
						}
						n = static_cast<const GDScriptParser::SubscriptNode *>(n->base);
					}
				}
				
				
				GDScriptCodeGenerator::Address base = _parse_expression(codegen, r_error, chain.back()->get()->base);
				if (r_error) {
					return GDScriptCodeGenerator::Address();
				}
				GDScriptCodeGenerator::Address prev_base = base;