### 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)

gen->write_end_jump_if_shared();
						}
					}
					if (!info.is_named && info.key.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
						gen->pop_temporary();
					}
					if (assigned.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
						gen->pop_temporary();
					}
					assigned = info.base;
				}
				bool known_type = assigned.type.has_type;
				bool is_shared = Variant::is_type_shared(assigned.type.builtin_type);
				if (!known_type || !is_shared) {
					
					
					if (assign_class_member_property != StringName()) {
						if (!known_type) {
							gen->write_jump_if_shared(assigned);
						}
						gen->write_set_member(assigned, assign_class_member_property);
						if (!known_type) {
							gen->write_end_jump_if_shared();
						}
					} else if (is_member_property) {
						
						if (!known_type) {
							gen->write_jump_if_shared(assigned);
						}
						if (member_property_has_setter && !member_property_is_in_setter) {