The product with SKU [SKU] has requested an update of the attribute [ATTRIBUTE]. Updating this attribute value will make it inconsistent with the other products within the variation family. If you would like to add this product to the variation family, please ensure all the attribute values are consistent.
This error occurs when you are attempting to update an attribute value on a SKU, updating which will make it inconsistent with the other products within the variation family.
To resolve this error, delete the SKU from the variation family and then perform the update.