### 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 if (local_type.kind == GDScriptDataType::BUILTIN) {
						codegen.generator->write_construct(local, local_type.builtin_type, Vector<GDScriptCodeGenerator::Address>());
						initialized = true;
					}
					
				}
				
				if (!initialized && p_block->is_in_loop) {
					codegen.generator->write_construct(local, Variant::NIL, Vector<GDScriptCodeGenerator::Address>());
				}
			} break;
			case GDScriptParser::Node::CONSTANT: {
				
				const GDScriptParser::ConstantNode *lc = static_cast<const GDScriptParser::ConstantNode *>(s);
				if (!lc->initializer->is_constant) {
					_set_error("Local constant must have a constant value as initializer.", lc->initializer);
					return ERR_PARSE_ERROR;
				}
				codegen.add_local_constant(lc->identifier->name, lc->initializer->reduced_value);
			} break;
			case GDScriptParser::Node::PASS:
				
				break;
			default: {
				
				if (s->is_expression()) {
					GDScriptCodeGenerator::Address expr = _parse_expression(codegen, err, static_cast<const GDScriptParser::ExpressionNode *>(s), true);
					if (err) {
						return err;
					}