ScriptableObject loses data after Reload

I have made database of the Enemies class, then I have a EditorWindow where I add and edit my Database, but whenever I close and open my Unity, all data is gone! But when I play and stop my game, the data is still there tho. I have serialized all classes that I needed, made and saved my ScriptableObject as an Asset, but still all my data is lost after Unity is closed.

 [System.Serializable]
 public class EnemyDatabase : ScriptableObject {
 
     [SerializeField] public List<Enemy> database;
 
     void OnEnable() {
         if (database == null) {
             database = new List<Enemy> ();
         }
     }
 }

Here is the Enemy class:

 [System.Serializable]
 public class Enemy {
 
     [SerializeField] public string enemyName;
     [SerializeField] public int id;
     [SerializeField] public int damage;
     [SerializeField] public int points;
     [SerializeField] public float speed;
     [SerializeField] public float chance;
     [SerializeField] public GameObject prefab;
 
     public Enemy(string name, int newId, int dmg, int pnts, float vel, float rarity, GameObject go) {
         enemyName = name;
         id = newId;
         damage = dmg;
         points = pnts;
         speed = vel;
         chance = rarity;
         prefab = go;
     }
 
 }

And the EditorWindow script, where I create a new Database if there isn't one, and then save it as an Asset:

     void CreateDatabase() {
         enemyDatabase = ScriptableObject.CreateInstance<EnemyDatabase> ();
         AssetDatabase.CreateAsset (enemyDatabase, DATABASE_PATH);
         AssetDatabase.SaveAssets ();
         AssetDatabase.Refresh ();
     }