How to get data from Scriptable Objects without copy-pasting code

I am trying to create an item system in Unity3d. The system relies on saving items as both Prefabs and Scriptable Objects.

Whenever I want to load data from a Item Scriptable Object, I have to create use Item C# script and attach it to a GameObject. Doing this forces me to copy and paste the same fields as the ones in the Item Scriptable Object.

This is a problem because whenever I update the Item Scriptable Object with a new field, I have to make sure I update the Item C# script with the same field.

I have tried looking into a design pattern that might solve the issue of having to copy and paste fields to be in two script files but have not found anything yet. I have looked into using JSON files to replace Scriptable Objects but since Scriptable Object is built into Unity, I would prefer to use it over JSON.

public class ItemBase : MonoBehaviour
{
        [SerializeField] private string itemID;
        [SerializeField] private string itemName;
        [SerializeField] private string itemFlavorText;
        [SerializeField] private float itemLevel;
        [SerializeField] private Sprite itemSprite;

        #region Getters and Setters
        public string ItemID { get => itemID; set => itemID = value; }
        public string ItemName { get => itemName; set => itemName = value; }
        public string ItemFlavorText { get => itemFlavorText; set => itemFlavorText = value; }
        public float ItemLevel { get => itemLevel; set => itemLevel = value; }
        public Sprite ItemSprite { get => itemSprite; set => itemSprite = value; }
        #endregion

        /// <summary>
        /// Obtains references from the ItemSO on the ItemPrefab class.
        /// </summary>
        [ContextMenu("Add References")]
        public void AddReferences()
        {
            ItemSO item = gameObject.GetComponent<ItemPrefab>().Item;

            ItemID = item.ItemBase.ItemID;
            ItemName = item.ItemBase.ItemName;
            ItemFlavorText = item.ItemBase.ItemFlavorText;
            ItemLevel = item.ItemBase.ItemLevel;
            ItemSprite = item.ItemBase.ItemSprite;
        }
}


    [System.Serializable]
    public class ItemBaseSO
    {
        [SerializeField] private string itemID;
        [SerializeField] private string itemName;
        [SerializeField] private string itemFlavorText;
        [SerializeField] private float itemLevel;
        [SerializeField] private Sprite itemSprite;

        #region Getters and Setters
        public string ItemID { get => itemID; set => itemID = value; }
        public string ItemName { get => itemName; set => itemName = value; }
        public string ItemFlavorText { get => itemFlavorText; set => itemFlavorText = value; }
        public float ItemLevel { get => itemLevel; set => itemLevel = value; }
        public Sprite ItemSprite { get => itemSprite; set => itemSprite = value; }
        #endregion
    }

I place the ItemBase script on an Item Prefab and keep ItemBaseSO in a Resources folder for easier loading.

I would like to keep being able to use Scriptable Objects without having to copy and paste fields.