diff --git a/server/AyaNova/biz/PartAssemblyBiz.cs b/server/AyaNova/biz/PartAssemblyBiz.cs
index 5fede792..d190bf74 100644
--- a/server/AyaNova/biz/PartAssemblyBiz.cs
+++ b/server/AyaNova/biz/PartAssemblyBiz.cs
@@ -60,36 +60,7 @@ namespace AyaNova.Biz
             }
         }
 
-        /*
-        static void Main(string[] args)
-    {
-        using (var dbContext = new DbParentChild())
-        {
-            var parent = new Parent
-            {
-                FirstName = "Joe",
-                LastName = "Smith"
-            };
-
-            parent.Children.Add(
-                new Child
-                {
-                    FirstName = "LittleJoe",
-                    LastName = "Smith"
-                });
-            parent.Children.Add(
-                new Child
-                {
-                    FirstName = "Anne",
-                    LastName = "Smith"
-                });
-
-            dbContext.Add(parent);
-            dbContext.SaveChanges();
-        }
-    }
-        */
-
+       
         ////////////////////////////////////////////////////////////////////////////////////////////////
         //DUPLICATE
         //
@@ -135,9 +106,10 @@ namespace AyaNova.Biz
             return ret;
         }
 
-        ////////////////////////////////////////////////////////////////////////////////////////////////
+        /*
+          ////////////////////////////////////////////////////////////////////////////////////////////////
         //UPDATE
-        //
+        //this is how it was roughly
         internal async Task<PartAssembly> PutAsync(PartAssembly putObject)
         {
             // PartAssembly dbObject = await ct.PartAssembly.SingleOrDefaultAsync(m => m.Id == putObject.Id);
@@ -147,9 +119,9 @@ namespace AyaNova.Biz
                 AddError(ApiErrorCode.NOT_FOUND, "id");
                 return null;
             }
-           // PartAssembly SnapshotOfOriginalDBObj = new PartAssembly();
-            //CopyObject.Copy(dbObject, SnapshotOfOriginalDBObj);
-            //CopyObject.Copy(putObject, dbObject, "Id");
+            PartAssembly SnapshotOfOriginalDBObj = new PartAssembly();
+            CopyObject.Copy(dbObject, SnapshotOfOriginalDBObj);
+            CopyObject.Copy(putObject, dbObject, "Id");
             dbObject.Tags = TagBiz.NormalizeTags(dbObject.Tags);
             dbObject.CustomFields = JsonUtil.CompactJson(dbObject.CustomFields);
             ct.Entry(dbObject).OriginalValues["Concurrency"] = putObject.Concurrency;
@@ -173,6 +145,44 @@ namespace AyaNova.Biz
             await HandlePotentialNotificationEvent(AyaEvent.Modified, dbObject, SnapshotOfOriginalDBObj);
             return dbObject;
         }
+        */
+
+        ////////////////////////////////////////////////////////////////////////////////////////////////
+        //UPDATE
+        //
+        internal async Task<PartAssembly> PutAsync(PartAssembly putObject)
+        { 
+            //Get the db object with no tracking as about to be replaced not updated     
+            PartAssembly dbObject = await GetAsync(putObject.Id, false);
+            if (dbObject == null)
+            {
+                AddError(ApiErrorCode.NOT_FOUND, "id");
+                return null;
+            }          
+         
+            putObject.Tags = TagBiz.NormalizeTags(putObject.Tags);
+            putObject.CustomFields = JsonUtil.CompactJson(putObject.CustomFields);
+            await ValidateAsync(putObject, dbObject);
+            ct.Replace(dbObject,putObject);
+            if (HasErrors) return null;
+            try
+            {
+                await ct.SaveChangesAsync();
+            }
+            catch (DbUpdateConcurrencyException)
+            {
+                if (!await ExistsAsync(putObject.Id))
+                    AddError(ApiErrorCode.NOT_FOUND);
+                else
+                    AddError(ApiErrorCode.CONCURRENCY_CONFLICT);
+                return null;
+            }
+            await EventLogProcessor.LogEventToDatabaseAsync(new Event(UserId, dbObject.Id, BizType, AyaEvent.Modified), ct);
+            await SearchIndexAsync(dbObject, false);
+            await TagBiz.ProcessUpdateTagsInRepositoryAsync(ct, putObject.Tags,dbObject.Tags);
+            await HandlePotentialNotificationEvent(AyaEvent.Modified, putObject, dbObject);
+            return putObject;
+        }
 
         ////////////////////////////////////////////////////////////////////////////////////////////////
         //DELETE
diff --git a/server/AyaNova/models/AyContext.cs b/server/AyaNova/models/AyContext.cs
index 7eace9b2..eb9968c0 100644
--- a/server/AyaNova/models/AyContext.cs
+++ b/server/AyaNova/models/AyContext.cs
@@ -90,7 +90,12 @@ namespace AyaNova.Models
         public AyContext(DbContextOptions<AyContext> options) : base(options)
         { }
 
-
+        //https://stackoverflow.com/a/64053832/8939
+        public void Replace<TEntity>(TEntity oldEntity, TEntity newEntity) where TEntity : class
+        {
+            ChangeTracker.TrackGraph(oldEntity, e => e.Entry.State = EntityState.Deleted);
+            ChangeTracker.TrackGraph(newEntity, e => e.Entry.State = e.Entry.IsKeySet ? EntityState.Modified : EntityState.Added);
+        }
 
         protected override void OnModelCreating(ModelBuilder modelBuilder)
         {