Forgot FormerlySerializedAs

com.unity.render-pipelines.core/CoreRP/Shadow/AdditionalShadowData.cs

     [RequireComponent(typeof(Light))]
     public class AdditionalShadowData : MonoBehaviour
     {
-        [SerializeField]
+        [SerializeField]
+        [UnityEngine.Serialization.FormerlySerializedAs("version")]
         private int m_Version = 1;
 #pragma warning restore 414