The merchandise with id gid://shopify/ProductVariant/xxxx does not exist.'

Retired Boards Appdev Custom Storefronts
3

I just realized that the ProductVariant ID that was used by the CartLineItem in my cart was non-existent. I have no idea where this ProductVariant ID came from. When doing a query for a productByHandle, I get this ProductVariant ID :

//query
{
  productByHandle(handle:"pacifica-beauty-ginger-root-10-in-1-hair-volumizer-spray-root-booster-for-hair-volume-lightweight-formula-for-all-hair-types-vitamins-antioxidants-sulfate-free-silicone-free-vegan"){
    variants(first:10){
      nodes {
        id
      }
    }
  }
}

//output
{
  "data": {
    "productByHandle": {
      "variants": {
        "nodes": [
          {
            "id": "gid://shopify/ProductVariant/45693587161409"
          }
        ]
      }
    }
  },

But looking at my Cart, this is the ProductVariant for that CartLineItem:

{
   "id":"gid://shopify/ProductVariant/45576784970049",
   "product":{
      "handle":"pacifica-beauty-ginger-root-10-in-1-hair-volumizer-spray-root-booster-for-hair-volume-lightweight-formula-for-all-hair-types-vitamins-antioxidants-sulfate-free-silicone-free-vegan",
      "title":"Pacifica Beauty, Ginger Root 10 In 1 Hair Volumizer Spray, Root Booster For Hair Volume, Lightweight Formula, For All Hair Types, Vitamins + Antioxidants, Sulfate Free, Silicone Free, Vegan",
      "id":"gid://shopify/Product/8337199399233"
   }
}

Has anyone ever encountered this discrepancy?