SKU consistency is the glue of multi-channel e-commerce. Inconsistent naming across Amazon, TikTok, and Shopify leads to “false backorders,” overselling nightmares, and unnecessary manual mapping fees. This post explains why the Amazon SKU is “set in stone” and how to use the “-FBM” suffix solution to manage hybrid fulfillment successfully. By standardizing your SKUs, you ensure that every sale—whether from a viral TikTok trend or a Shopify subscription—deducts from the same physical inventory pool. Stop fighting your WMS and start syncing your empire like a Swiss watch.