Try to avoid empty variables

workers.tf

@@ -37,7 +37,7 @@ resource "aws_autoscaling_group" "workers" {
 
   tag {
     key                 = "k8s.io/cluster-autoscaler/${var.cluster_name}"
-    value               = ""
+    value               = "owned"
     propagate_at_launch = true
   }
 }