In the column between source language and target language in Editor mode I normally see the confirm segment sign (a pencil and tick). What does a small circle, a small tick and a yellow pencll sign in all segments mean?

In the column between source and target in Editor mode I normally see the confirm segment sign (a pencil and tick). I have been asked to check a translation that has a small circle with a small tick and a yellow pencil sign in all segments. What does this mean?