### 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)

#include "gdscript_compiler.h"
#include "gdscript.h"
#include "gdscript_byte_codegen.h"
#include "gdscript_cache.h"
#include "gdscript_utility_functions.h"
#include "core/config/engine.h"
#include "core/config/project_settings.h"
bool GDScriptCompiler::_is_class_member_property(CodeGen &codegen, const StringName &p_name) {
	if (codegen.function_node && codegen.function_node->is_static) {
		return false;
	}
	if (_is_local_or_parameter(codegen, p_name)) {
		return false; 
	}
	return _is_class_member_property(codegen.script, p_name);
}
bool GDScriptCompiler::_is_class_member_property(GDScript *owner, const StringName &p_name) {
	GDScript *scr = owner;
	GDScriptNativeClass *nc = nullptr;
	while (scr) {
		if (scr->native.is_valid()) {
			nc = scr->native.ptr();
		}
		scr = scr->_base;
	}
	ERR_FAIL_COND_V(!nc, false);
	return ClassDB::has_property(nc->get_name(), p_name);
}
bool GDScriptCompiler::_is_local_or_parameter(CodeGen &codegen, const StringName &p_name) {