What does it mean to have a Grey/Gray line listed on my Transaction page?

Gman

I copied a transaction (and created one for scratch also just to be sure), and for some reason that line item/transaction is shown as Grey in my list of Transactions. It also doesn't have bolded text in the Date or Description columns like all my other transactions. The original transaction I copied from is not grey. And all the fields are filled out and I reviewed and Saved the transaction, with no error messages.
So what does a greyed transaction mean? I couldn't find anything in the Help Center.
Thanks