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Where's the rest of your code? You're creating your security group in a different vpc 

Right. It is really an AWS error. Security groups belong to particular VPCs. If you want to attach a SG to an EKS cluster, they must both be in the same VPC.

Yeah, <@U01FHMA71BK> has answered this question, but it turned out to be in incorrect attribute ref of VPC, should be `vpc.vpc_id`