diff --git a/pkg/models/tasks.go b/pkg/models/tasks.go
index 130b8f2b52..2a66ccbb2c 100644
--- a/pkg/models/tasks.go
+++ b/pkg/models/tasks.go
@@ -1612,7 +1612,7 @@ func (t *Task) Delete(s *xorm.Session, a web.Auth) (err error) {
 // @Router /tasks/{ID} [get]
 func (t *Task) ReadOne(s *xorm.Session, a web.Auth) (err error) {
 
-	*t, err = GetTaskSimple(s, t)
+	*t, err = GetTaskByIDSimple(s, t.ID)
 	if err != nil {
 		return
 	}
diff --git a/pkg/routes/caldav/listStorageProvider.go b/pkg/routes/caldav/listStorageProvider.go
index e2c5d3c8b7..9302ebf189 100644
--- a/pkg/routes/caldav/listStorageProvider.go
+++ b/pkg/routes/caldav/listStorageProvider.go
@@ -210,7 +210,7 @@ func (vcls *VikunjaCaldavListStorage) GetResource(rpath string) (*data.Resource,
 
 		// save and override the updated unix date to not break any later etag checks
 		updated := vcls.task.Updated
-		err := vcls.task.ReadOne(s, vcls.user)
+		tasks, err := models.GetTasksByUIDs(s, []string{vcls.task.UID}, vcls.user)
 		if err != nil {
 			_ = s.Rollback()
 			if models.IsErrTaskDoesNotExist(err) {
@@ -222,6 +222,11 @@ func (vcls *VikunjaCaldavListStorage) GetResource(rpath string) (*data.Resource,
 			return nil, false, err
 		}
 
+		if len(tasks) < 1 {
+			return nil, false, errs.ResourceNotFoundError
+		}
+		vcls.task = tasks[0]
+
 		if updated.Unix() > 0 {
 			vcls.task.Updated = updated
 		}