### 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)

codegen.generator->write_binary_operator(type_equality_addr, Variant::OP_OR, type_equality_addr, tmp_comp_addr);
				codegen.generator->pop_temporary(); 
			}
			codegen.generator->write_and_left_operand(type_equality_addr);
			
			GDScriptCodeGenerator::Address literal_addr = _parse_expression(codegen, r_error, p_pattern->literal);
			if (r_error) {
				return GDScriptCodeGenerator::Address();
			}
			
			GDScriptCodeGenerator::Address equality_addr = codegen.add_temporary(equality_type);
			codegen.generator->write_binary_operator(equality_addr, Variant::OP_EQUAL, p_value_addr, literal_addr);
			codegen.generator->write_and_right_operand(equality_addr);
			
			codegen.generator->write_end_and(type_equality_addr);
			codegen.generator->pop_temporary(); 
			if (literal_addr.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
				codegen.generator->pop_temporary();
			}
			
			if (p_is_nested) {
				
				codegen.generator->write_and_right_operand(type_equality_addr);
				codegen.generator->write_end_and(p_previous_test);
			} else if (!p_is_first) {
				
				codegen.generator->write_or_right_operand(type_equality_addr);
				codegen.generator->write_end_or(p_previous_test);
			} else {