I'm currently on 1703, CU on a KMS-activated machine. Got the ISOs from multiple sources but all are throwing the same error in the title. Has anyone managed to update from CU using ISO on a similar config? I was wondering if it is because I'm not using VL ISOs to upgrade and the ones I found in the web were not explicitly marked as VL. Clean install would work but I want to know if there's a way to bypass this and proceed with the install.