### 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)

return codegen.parameters.has(p_name) || codegen.locals.has(p_name);
}
void GDScriptCompiler::_set_error(const String &p_error, const GDScriptParser::Node *p_node) {
	if (!error.is_empty()) {
		return;
	}
	error = p_error;
	if (p_node) {
		err_line = p_node->start_line;
		err_column = p_node->leftmost_column;
	} else {
		err_line = 0;
		err_column = 0;
	}
}
GDScriptDataType GDScriptCompiler::_gdtype_from_datatype(const GDScriptParser::DataType &p_datatype, GDScript *p_owner) {
	if (!p_datatype.is_set() || !p_datatype.is_hard_type() || p_datatype.is_coroutine) {
		return GDScriptDataType();
	}
	GDScriptDataType result;
	result.has_type = true;
	switch (p_datatype.kind) {
		case GDScriptParser::DataType::VARIANT: {
			result.has_type = false;
		} break;
		case GDScriptParser::DataType::BUILTIN: {
			result.kind = GDScriptDataType::BUILTIN;
			result.builtin_type = p_datatype.builtin_type;