Creating product metafields not working

[wesleylathan]

The store has a set of metafields that are surfaced in the Shopify UI. The code runs without error, but the meta fields aren't updated.

Here's a screen shot of the fields in shopify

Here's the code I'm using to do the update. If I manually enter values through the UI and can pull the metafileds using ShopifySharp, I'm just not able to update the values.

       public async Task<bool> UpdateMetaFields(TCGProduct tCGProduct) {
           long? productId = (long)tCGProduct.Id;
           var service = new MetaFieldService(ShopifyTokens.myShopifyUrl, ShopifyTokens.shopAccessToken);
           
           
           var metafield = new MetaField()
           {
               Namespace = "custom",
               Key = "tcgplayer_id",
               Value = tCGProduct.TCGplayerID,
               Type = "integer",
               Description = "TCGPlayer ID"
           };
           var bar = await service.CreateAsync(metafield, Convert.ToInt64(tCGProduct.Id), "products");
           Debug.WriteLine(bar.Id + " " + bar.Key);
           return true;

       }