This error occurs if Walmart had trouble processing a feed to either create an item or update the item. Fortunately, Zentail regularly sends product information, pricing, and inventory feeds to Walmart. Therefore, we will automatically try upload the information to Walmart shortly after we receive that error. You do not need to do anything to resolve this.

If you notice this error occurring regularly (multiple times per day for consecutive days) for a specific SKU, please let us know.

Related reading:
How do I troubleshoot Walmart listing errors and issues?