### 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)

Vector<GDScriptCodeGenerator::Address> args;
							args.push_back(assigned);
							GDScriptCodeGenerator::Address call_base = is_static ? GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::CLASS) : GDScriptCodeGenerator::Address(GDScriptCodeGenerator::Address::SELF);
							gen->write_call(GDScriptCodeGenerator::Address(), call_base, member_property_setter_function, args);
						} else if (is_static) {
							GDScriptCodeGenerator::Address temp = codegen.add_temporary(static_var_data_type);
							gen->write_assign(temp, assigned);
							gen->write_set_static_variable(temp, static_var_class, static_var_index);
							gen->pop_temporary();
						} else {
							gen->write_assign(target_member_property, assigned);
						}
						if (!known_type) {
							gen->write_end_jump_if_shared();
						}
					}
				}
				if (assigned.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
					gen->pop_temporary();
				}
			} else if (assignment->assignee->type == GDScriptParser::Node::IDENTIFIER && _is_class_member_property(codegen, static_cast<GDScriptParser::IdentifierNode *>(assignment->assignee)->name)) {
				
				GDScriptCodeGenerator::Address assigned_value = _parse_expression(codegen, r_error, assignment->assigned_value);
				if (r_error) {
					return GDScriptCodeGenerator::Address();
				}
				GDScriptCodeGenerator::Address to_assign = assigned_value;
				bool has_operation = assignment->operation != GDScriptParser::AssignmentNode::OP_NONE;
				StringName name = static_cast<GDScriptParser::IdentifierNode *>(assignment->assignee)->name;
				if (has_operation) {