What is it
My best guess is Scabious, which is a member of the honeysuckle family and very nutrition rich for honeybees, bumblebees, solitary bees and many other pollinators. This is a good thing, but if you do not want them climbing all over your berries, you can cut them back in the fall after the blossoms are gone and leave some in hopes they will bloom again next year. Late flowering plants really help the bumblebees, because they like to forage in the cooler temperatures. I have not seen this, so thanks for sending your question!