diff --git a/task/manager.go b/task/manager.go
index 15a2e5158..6d2f8a4c6 100644
--- a/task/manager.go
+++ b/task/manager.go
@@ -175,49 +175,63 @@ func (m *Manager) Create(db *gorm.DB, requested *Task) (err error) {
 
 // Update update task.
 func (m *Manager) Update(db *gorm.DB, requested *Task) (err error) {
-	task := &Task{}
-	err = db.First(task, requested.ID).Error
+	found := &Task{}
+	err = db.First(found, requested.ID).Error
 	if err != nil {
 		return
 	}
-	switch task.State {
-	case Created,
-		Ready:
-		task.UpdateUser = requested.UpdateUser
-		task.Name = requested.Name
-		task.Kind = requested.Kind
-		task.Addon = requested.Addon
-		task.Extensions = requested.Extensions
-		task.State = requested.State
-		task.Locator = requested.Locator
-		task.Priority = requested.Priority
-		task.Policy = requested.Policy
-		task.TTL = requested.TTL
-		task.Data = requested.Data
-		task.ApplicationID = requested.ApplicationID
-	case Pending,
+	switch found.State {
+	case Created:
+		db = db.Select(
+			"UpdateUser",
+			"Name",
+			"Kind",
+			"Addon",
+			"Extensions",
+			"State",
+			"Locator",
+			"Priority",
+			"Policy",
+			"TTL",
+			"Data",
+			"ApplicationID")
+		err = m.findRefs(requested)
+		if err != nil {
+			return
+		}
+		db = db.Where("State", Created)
+		err = db.Save(requested).Error
+		if err != nil {
+			err = liberr.Wrap(err)
+			return
+		}
+	case Ready,
+		Pending,
 		QuotaBlocked,
 		Postponed:
-		task.UpdateUser = requested.UpdateUser
-		task.Name = requested.Name
-		task.Locator = requested.Locator
-		task.Data = requested.Data
-		task.Priority = requested.Priority
-		task.Policy = requested.Policy
-		task.TTL = requested.TTL
+		db = db.Select(
+			"UpdateUser",
+			"Name",
+			"Locator",
+			"Policy",
+			"TTL")
+		db = db.Where(
+			"state IN (?)",
+			[]string{
+				Ready,
+				Pending,
+				QuotaBlocked,
+				Postponed,
+			})
+		err = db.Save(requested).Error
+		if err != nil {
+			err = liberr.Wrap(err)
+			return
+		}
 	default:
 		// discarded.
 		return
 	}
-	err = m.findRefs(task)
-	if err != nil {
-		return
-	}
-	err = db.Save(task).Error
-	if err != nil {
-		err = liberr.Wrap(err)
-		return
-	}
 	return
 }
 
@@ -268,7 +282,7 @@ func (m *Manager) Cancel(db *gorm.DB, id uint) (err error) {
 			if err != nil {
 				return
 			}
-			err = m.DB.Save(task).Error
+			err = task.update(m.DB)
 			if err != nil {
 				err = liberr.Wrap(err)
 				return
@@ -384,7 +398,7 @@ func (m *Manager) disconnected(list []*Task) (kept []*Task, err error) {
 		task.State = Failed
 		task.Terminated = &mark
 		task.Error("Error", "Hub is disconnected.")
-		err = m.DB.Save(task).Error
+		err = task.update(m.DB)
 		if err != nil {
 			err = liberr.Wrap(err)
 			return
@@ -455,7 +469,7 @@ func (m *Manager) selectAddons(list []*Task) (kept []*Task, err error) {
 				task.Error("Error", err.Error())
 				task.Terminated = &mark
 				task.State = Failed
-				err = m.DB.Save(task).Error
+				err = task.update(m.DB)
 				if err != nil {
 					err = liberr.Wrap(err)
 					return
@@ -608,7 +622,7 @@ func (m *Manager) postpone(list []*Task) (err error) {
 			updated = true
 		}
 		if updated {
-			err = m.DB.Save(task).Error
+			err = task.update(m.DB)
 			if err != nil {
 				err = liberr.Wrap(err)
 				return
@@ -640,7 +654,7 @@ func (m *Manager) adjustPriority(list []*Task) (err error) {
 			return
 		}
 		task.State = Ready
-		err = m.DB.Save(task).Error
+		err = task.update(m.DB)
 		if err != nil {
 			err = liberr.Wrap(err)
 			return
@@ -671,7 +685,7 @@ func (m *Manager) createPod(list []*Task) (err error) {
 			Log.Error(err, "")
 			return
 		}
-		err = m.DB.Save(ready).Error
+		err = ready.update(m.DB)
 		if err != nil {
 			err = liberr.Wrap(err)
 			return
@@ -788,7 +802,7 @@ func (m *Manager) preempt(list []*Task) (err error) {
 		p.Errors = nil
 		p.Event(Preempted, reason)
 		Log.Info(reason)
-		err = m.DB.Save(p).Error
+		err = p.update(m.DB)
 		if err != nil {
 			err = liberr.Wrap(err)
 			return
@@ -848,7 +862,7 @@ func (m *Manager) updateRunning() {
 				}
 			}
 		}
-		err = m.DB.Save(&running).Error
+		err = running.update(m.DB)
 		if err != nil {
 			err = liberr.Wrap(err)
 			return
@@ -1627,6 +1641,24 @@ func (r *Task) containsAny(str string, substr ...string) (matched bool) {
 	return
 }
 
+// update manager controlled fields.
+func (r *Task) update(db *gorm.DB) (err error) {
+	db = db.Select(
+		"Addon",
+		"Extensions",
+		"State",
+		"Priority",
+		"Started",
+		"Terminated",
+		"Events",
+		"Error",
+		"Retries",
+		"Attached",
+		"Pod")
+	err = db.Save(r).Error
+	return
+}
+
 // Event represents a pod event.
 type Event struct {
 	Type     string