Comment 1 for bug 1243087

So it seems the issue is actually that Heat is still listing the stacks that are in DELETE_COMPLETE status in a rarely seen bug. Usually, stacks with that status should not be listed anymore, so Horizon should _probably_ never get into this situation.

You might want to make sure with the Heat team that there are absolutely no cases where deleted stacks are ever listed and if so, ignore this issue and close the bug. Or handle the case just to be sure.