### 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)

PT_LITERAL,
			PT_EXPRESSION,
			PT_BIND,
			PT_ARRAY,
			PT_DICTIONARY,
			PT_REST,
			PT_WILDCARD,
		};
		Type pattern_type = PT_LITERAL;
		union {
			LiteralNode *literal = nullptr;
			IdentifierNode *bind;
			ExpressionNode *expression;
		};
		Vector<PatternNode *> array;
		bool rest_used = false; 
		struct Pair {
			ExpressionNode *key = nullptr;
			PatternNode *value_pattern = nullptr;
		};
		Vector<Pair> dictionary;
		HashMap<StringName, IdentifierNode *> binds;
		bool has_bind(const StringName &p_name);
		IdentifierNode *get_bind(const StringName &p_name);
		PatternNode() {