### 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)

scr = scr->_base;
				}
			}
			
			{
				GDScript *owner = codegen.script;
				while (owner) {
					GDScript *scr = owner;
					GDScriptNativeClass *nc = nullptr;
					while (scr) {
						if (scr->constants.has(identifier)) {
							return codegen.add_constant(scr->constants[identifier]); 
						}
						if (scr->native.is_valid()) {
							nc = scr->native.ptr();
						}
						scr = scr->_base;
					}
					
					if (nc) {
						bool success = false;
						int64_t constant = ClassDB::get_integer_constant(nc->get_name(), identifier, &success);
						if (success) {
							return codegen.add_constant(constant);
						}
					}
					owner = owner->_owner;
				}
			}