post indexer shows deleted posts

I have this issue that was brought up a year ago:
https://premium.wpmudev.org/forums/topic/global-search-finds-long-deleted-posts-from-long-deleted-blogs.

Old marketpress products from deleted blogs are showing up and I can't remove them. How do I fix? I am using post indexer Version: 3.0.4 with gridmarket theme to display the global products.

How do I fix?