diff --git a/pkg/models/tasks.go b/pkg/models/tasks.go
index 65b4b02c2..c2ef78e7d 100644
--- a/pkg/models/tasks.go
+++ b/pkg/models/tasks.go
@@ -579,6 +579,11 @@ func getRemindersForTasks(s *xorm.Session, taskIDs []int64) (reminders []*TaskRe
 }
 
 func (t *Task) setIdentifier(project *Project) {
+	if project == nil {
+		t.Identifier = "#" + strconv.FormatInt(t.Index, 10)
+		return
+	}
+
 	t.Identifier = project.Identifier + "-" + strconv.FormatInt(t.Index, 10)
 }