WD RED in UNRAID NAS shows errors

I have a NAS that is using UNRAID for OS and three internal drives. One of the three disks (WD Red 4TB purchased in August 2019) used for the parity raid is showing ‘error’ in the SMART on the dashboard. I am not sure if this is a possible issue with the HD or something being detected through the UNRAID OS.

can anyone possibly provide insight for this?