diff --git a/models/migrations/v68.go b/models/migrations/v68.go
index 0faf61db4..a756f595c 100644
--- a/models/migrations/v68.go
+++ b/models/migrations/v68.go
@@ -5,6 +5,7 @@
 package migrations
 
 import (
+	"fmt"
 	"strings"
 
 	"code.gitea.io/gitea/models"
@@ -20,6 +21,13 @@ func reformatAndRemoveIncorrectTopics(x *xorm.Engine) (err error) {
 		Name string `xorm:"unique"`
 	}
 
+	if err := x.Sync2(new(models.Topic)); err != nil {
+		return fmt.Errorf("Sync2: %v", err)
+	}
+	if err := x.Sync2(new(models.RepoTopic)); err != nil {
+		return fmt.Errorf("Sync2: %v", err)
+	}
+
 	sess := x.NewSession()
 	defer sess.Close()