### 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)

Member(ClassNode *p_class) {
				type = CLASS;
				m_class = p_class;
			}
			Member(ConstantNode *p_constant) {
				type = CONSTANT;
				constant = p_constant;
			}
			Member(VariableNode *p_variable) {
				type = VARIABLE;
				variable = p_variable;
			}
			Member(SignalNode *p_signal) {
				type = SIGNAL;
				signal = p_signal;
			}
			Member(FunctionNode *p_function) {
				type = FUNCTION;
				function = p_function;
			}
			Member(EnumNode *p_enum) {
				type = ENUM;
				m_enum = p_enum;
			}
			Member(const EnumNode::Value &p_enum_value) {
				type = ENUM_VALUE;
				enum_value = p_enum_value;
			}
			Member(AnnotationNode *p_annotation) {