### 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)

return GDScriptCodeGenerator::Address();
			}
			gen->write_ternary_true_expr(true_expr);
			if (true_expr.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
				gen->pop_temporary();
			}
			GDScriptCodeGenerator::Address false_expr = _parse_expression(codegen, r_error, ternary->false_expr);
			if (r_error) {
				return GDScriptCodeGenerator::Address();
			}
			gen->write_ternary_false_expr(false_expr);
			if (false_expr.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
				gen->pop_temporary();
			}
			gen->write_end_ternary();
			return result;
		} break;
		case GDScriptParser::Node::TYPE_TEST: {
			const GDScriptParser::TypeTestNode *type_test = static_cast<const GDScriptParser::TypeTestNode *>(p_expression);
			GDScriptCodeGenerator::Address result = codegen.add_temporary(_gdtype_from_datatype(type_test->get_datatype(), codegen.script));
			GDScriptCodeGenerator::Address operand = _parse_expression(codegen, r_error, type_test->operand);
			GDScriptDataType test_type = _gdtype_from_datatype(type_test->test_datatype, codegen.script);
			if (r_error) {
				return GDScriptCodeGenerator::Address();
			}
			if (test_type.has_type) {
				gen->write_type_test(result, operand, test_type);
			} else {
				gen->write_assign_true(result);
			}