### 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 {
				
				codegen.generator->write_assign(p_previous_test, result_addr);
			}
			codegen.generator->pop_temporary(); 
			return p_previous_test;
		} break;
		case GDScriptParser::PatternNode::PT_DICTIONARY: {
			if (p_is_nested) {
				codegen.generator->write_and_left_operand(p_previous_test);
			} else if (!p_is_first) {
				codegen.generator->write_or_left_operand(p_previous_test);
			}
			
			GDScriptCodeGenerator::Address dict_type_addr = codegen.add_constant((int)Variant::DICTIONARY);
			
			GDScriptDataType temp_type;
			temp_type.has_type = true;
			temp_type.kind = GDScriptDataType::BUILTIN;
			temp_type.builtin_type = Variant::BOOL;
			
			GDScriptCodeGenerator::Address result_addr = codegen.add_temporary(temp_type);
			codegen.generator->write_binary_operator(result_addr, Variant::OP_EQUAL, p_type_addr, dict_type_addr);
			codegen.generator->write_and_left_operand(result_addr);
			
			GDScriptCodeGenerator::Address dict_length_addr = codegen.add_constant(p_pattern->rest_used ? p_pattern->dictionary.size() - 1 : p_pattern->dictionary.size());
			
			temp_type.builtin_type = Variant::INT;
			GDScriptCodeGenerator::Address value_length_addr = codegen.add_temporary(temp_type);
			Vector<GDScriptCodeGenerator::Address> func_args;