### 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)

case GDScriptParser::Node::BREAKPOINT: {
#ifdef DEBUG_ENABLED
				gen->write_breakpoint();
#endif
			} break;
			case GDScriptParser::Node::VARIABLE: {
				const GDScriptParser::VariableNode *lv = static_cast<const GDScriptParser::VariableNode *>(s);
				
				GDScriptCodeGenerator::Address local = codegen.locals[lv->identifier->name];
				GDScriptDataType local_type = _gdtype_from_datatype(lv->get_datatype(), codegen.script);
				bool initialized = false;
				if (lv->initializer != nullptr) {
					GDScriptCodeGenerator::Address src_address = _parse_expression(codegen, err, lv->initializer);
					if (err) {
						return err;
					}
					if (lv->use_conversion_assign) {
						gen->write_assign_with_conversion(local, src_address);
					} else {
						gen->write_assign(local, src_address);
					}
					if (src_address.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
						codegen.generator->pop_temporary();
					}
					initialized = true;
				} else if (local_type.has_type) {
					
					if (local_type.has_container_element_type()) {
						codegen.generator->write_construct_typed_array(local, local_type.get_container_element_type(), Vector<GDScriptCodeGenerator::Address>());
						initialized = true;