### 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)

String script_path;
	bool for_completion = false;
	bool panic_mode = false;
	bool can_break = false;
	bool can_continue = false;
	List<bool> multiline_stack;
	ClassNode *head = nullptr;
	Node *list = nullptr;
	List<ParserError> errors;
#ifdef DEBUG_ENABLED
	bool is_ignoring_warnings = false;
	List<GDScriptWarning> warnings;
	HashSet<GDScriptWarning::Code> ignored_warnings;
	HashSet<int> unsafe_lines;
#endif
	GDScriptTokenizer tokenizer;
	GDScriptTokenizer::Token previous;
	GDScriptTokenizer::Token current;
	ClassNode *current_class = nullptr;
	FunctionNode *current_function = nullptr;
	SuiteNode *current_suite = nullptr;
	CompletionContext completion_context;
	CompletionCall completion_call;
	List<CompletionCall> completion_call_stack;
	bool passed_cursor = false;
	bool in_lambda = false;
	bool lambda_ended = false; 
	typedef bool (GDScriptParser::*AnnotationAction)(const AnnotationNode *p_annotation, Node *p_target);
	struct AnnotationInfo {
		enum TargetKind {