diff --git a/models/issue_comment.go b/models/issue_comment.go
index 2eadba810b..e133cc049b 100644
--- a/models/issue_comment.go
+++ b/models/issue_comment.go
@@ -214,12 +214,13 @@ func (c *Comment) LoadLabel() error {
 	has, err := x.ID(c.LabelID).Get(&label)
 	if err != nil {
 		return err
-	} else if !has {
-		return ErrLabelNotExist{
-			LabelID: c.LabelID,
-		}
+	} else if has {
+		c.Label = &label
+	} else {
+		// Ignore Label is deleted, but not clear this table
+		log.Warn("Commit %d cannot load label %d", c.ID, c.LabelID)
 	}
-	c.Label = &label
+
 	return nil
 }
 
diff --git a/models/issue_label.go b/models/issue_label.go
index 970b3fcc4c..015e7f128d 100644
--- a/models/issue_label.go
+++ b/models/issue_label.go
@@ -249,6 +249,11 @@ func DeleteLabel(repoID, labelID int64) error {
 		return err
 	}
 
+	// Clear label id in comment table
+	if _, err = sess.Where("label_id = ?", labelID).Cols("label_id").Update(&Comment{}); err != nil {
+		return err
+	}
+
 	return sess.Commit()
 }
 
diff --git a/templates/repo/issue/view_content.tmpl b/templates/repo/issue/view_content.tmpl
index 40993e54d2..381c80cdaf 100644
--- a/templates/repo/issue/view_content.tmpl
+++ b/templates/repo/issue/view_content.tmpl
@@ -145,14 +145,16 @@
 						</div>
 					</div>
 				{{else if eq .Type 7}}
-					<div class="event">
-						<span class="octicon octicon-primitive-dot"></span>
-						<a class="ui avatar image" href="{{.Poster.HomeLink}}">
-							<img src="{{.Poster.RelAvatarLink}}">
-						</a>
-						<span class="text grey"><a href="{{.Poster.HomeLink}}">{{.Poster.Name}}</a>
-						{{if .Content}}{{$.i18n.Tr "repo.issues.add_label_at" .Label.ForegroundColor .Label.Color .Label.Name $createdStr | Safe}}{{else}}{{$.i18n.Tr "repo.issues.remove_label_at" .Label.ForegroundColor .Label.Color .Label.Name $createdStr | Safe}}{{end}}</span>
-					</div>
+					{{if .Label}}
+						<div class="event">
+							<span class="octicon octicon-primitive-dot"></span>
+							<a class="ui avatar image" href="{{.Poster.HomeLink}}">
+								<img src="{{.Poster.RelAvatarLink}}">
+							</a>
+							<span class="text grey"><a href="{{.Poster.HomeLink}}">{{.Poster.Name}}</a>
+							{{if .Content}}{{$.i18n.Tr "repo.issues.add_label_at" .Label.ForegroundColor .Label.Color .Label.Name $createdStr | Safe}}{{else}}{{$.i18n.Tr "repo.issues.remove_label_at" .Label.ForegroundColor .Label.Color .Label.Name $createdStr | Safe}}{{end}}</span>
+						</div>
+					{{end}}
 				{{else if eq .Type 8}}
 					<div class="event">
 						<span class="octicon octicon-primitive-dot"></span>