Syncio requires unique SKUs for each variant in order to sync inventory and product information correctly.
​
If a product you are trying to sync contains a duplicate SKU, Syncio will assign this status to the product:

You will need update the original source product's duplicate SKUs to be unique or contact the source store to do so.
​
For example, here are two variants with the same SKU:
​

In order to make this product valid for syncing, the duplicate must be updated to be unique:
​

Once the source product has been updated. Try syncing the product with the: Attention status again.