Strange Numbers Printed onto Blueberries

Occurred on June 29, 2018 / Stanton Suffolk, UK

Info from Licensor: "I was just about to eat my fruit for breakfast this morning and the sunlight caught a number on a blueberry, it was 05988. I really could not believe what I was seeing as it was so small and what is a number doing on a blueberry? I took a picture but then thought people would simple say 'Ahh yes Mike Photoshopped it'.
So I took a video of it, bit difficult to focus but did eventually get it perfectly focused. What is it, GM modified food? It can't be an imprint from the container. How did it get there? It was bought at Tesco, part of Walmart in the USA, so I also videoed the package for full evidence. The blueberry is currently being kept in quarantine in the fridge."