Bugs in my hamster food

[ArmaniHammi]

Hi! I've used this brand of food since I got my hamster 18 months ago and it's always been fine. This particular batch I bought a couple of months ago and right away I froze it. After that, I just gave it to my hamster without any issues. Well, today I was putting it in his bowl and I noticed TINY LIGHT BROWN BUGS in the food. So I went to the container and there were HUNDREDS of them. What do I do? Are they bad?

Ps. I also have another food mix in a different container and I checked and it was fine. Maybe it's the mix, or the container ( it never shuts properly)