### Godot version

3b086aa06

### System information

ArchLinux x11

### Issue description

```gdscript
extends Node

@export_group("My Properties")
@export var number = 3
@export var string = ""

@export_group("Prefixed Properties", "prefix_")
@export var prefix_number = 3
@export var prefix_string = ""

@export_group("", "")
@export var ungrouped_number = 3
```

![image](https://user-images.githubusercontent.com/70787919/214983963-528c415b-745b-47fc-9777-36ebe31a3060.png)


### Steps to reproduce

- create script
- @export_group
- go inspector

### Minimal reproduction project

‮
p_cast->is_constant = true;
			p_cast->reduced_value = p_cast->operand->reduced_value;
		}
	}
	if (!cast_type.is_variant()) {
		GDScriptParser::DataType op_type = p_cast->operand->get_datatype();
		if (op_type.is_variant() || !op_type.is_hard_type()) {
			mark_node_unsafe(p_cast);
#ifdef DEBUG_ENABLED
			if (op_type.is_variant() && !op_type.is_hard_type()) {
				parser->push_warning(p_cast, GDScriptWarning::UNSAFE_CAST, cast_type.to_string());
			}
#endif
		} else {
			bool valid = false;
			if (op_type.builtin_type == Variant::INT && cast_type.kind == GDScriptParser::DataType::ENUM) {
				mark_node_unsafe(p_cast);
				valid = true;
			} else if (op_type.kind == GDScriptParser::DataType::BUILTIN && cast_type.kind == GDScriptParser::DataType::BUILTIN) {
				valid = Variant::can_convert(op_type.builtin_type, cast_type.builtin_type);
			} else if (op_type.kind != GDScriptParser::DataType::BUILTIN && cast_type.kind != GDScriptParser::DataType::BUILTIN) {
				valid = is_type_compatible(cast_type, op_type) || is_type_compatible(op_type, cast_type);
			}
			if (!valid) {
				push_error(vformat(R"(Invalid cast. Cannot convert from "%s" to "%s".)", op_type.to_string(), cast_type.to_string()), p_cast->cast_type);
			}
		}
	}
}
void GDScriptAnalyzer::reduce_dictionary(GDScriptParser::DictionaryNode *p_dictionary) {