Bug A Bug about save to json

In this project, inventory items will be saved to json file in guid.
Like that:

Code (CSharp):

1. public class SerializableScriptableObject : ScriptableObject
2. {
3.     [SerializeField, HideInInspector] private string _guid;
4.     public string Guid => _guid;
5.  
6. #if UNITY_EDITOR
7.     void OnValidate()
8.     {
9.         var path = AssetDatabase.GetAssetPath(this);
10.         _guid = AssetDatabase.AssetPathToGUID(path);
11.     }
12. #endif
13. }

But when I use "Use existing build" mode in Addressables, all saved items guid would be null.
Like that:

Code (CSharp):

1. {
2.     "_locationId": "",
3.     "_itemStacks": [
4.         {
5.             "itemGuid": "",
6.             "amount": 1
7.         },
8.         {
9.             "itemGuid": "",
10.             "amount": 20
11.         },
12.         {
13.             "itemGuid": "",
14.             "amount": 20
15.         },
16.         {
17.             "itemGuid": "",
18.             "amount": 20
19.         },
20.         {
21.             "itemGuid": "",
22.             "amount": 20
23.         },
24.         {
25.             "itemGuid": "",
26.             "amount": 1
27.         }
28.     ],
29.     "_finishedQuestlineItemsGUIds": [],
30.     "_masterVolume": 1.0,
31.     "_musicVolume": 1.0,
32.     "_sfxVolume": 1.0,
33.     "_resolutionsIndex": 11,
34.     "_antiAliasingIndex": 2,
35.     "_shadowDistance": 50.0,
36.     "_isFullscreen": false,
37.     "_currentLocale": {
38.         "instanceID": 0
39.     }
40. }

That's interesting, so i remove the [HideInInspect] attribute, and the items guid in in editor runtime would be null.

Code (CSharp):

1. [SerializeField] private string _guid;

So, the problem is when building addressables, this code will get a null guid?

Code (CSharp):

1. void OnValidate()
2.     {
3.         var path = AssetDatabase.GetAssetPath(this);
4.         _guid = AssetDatabase.AssetPathToGUID(path);
5.     }

Can I trust this workflow which save ScriptableObject's guid to json to locate all unique assets?