Based on the above image, it shows the warning message - remove halt detected over 1% until 100% remove products/variants. 

  • This warning message will show up in the feed details when you set the warning halt process message percentage for the remove products. 
  • Stock Sync will stop the remove process so that all your products won't be remove. 

For your information on how to set the warning message for remove products, you can click here to know more.