Lightroom Mobile iOS Skip Import Duplicates from SD Card Reader

Recently bought a Lightning to SD Card reader to import images from my SD Card in the field.  However, it appears the process will import ALL images I've checked then upload them again.  I cannot find an option or feature that allows me to ignore/skip duplicates.  I notice it detects the images in Lr by placing a Lr icon in the corner.  My questions is, where is the option to skip duplicates so i don't have to re-import and re-upload?  It obviously detects previously imported files.

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