I concur that the 'Alert Message' in the Check In column picker is the deprecated asset.copy_alert from the old style item alerts.
I also confirmed that the deprecated item 'Alert Message' appears in the experimental Angular Check In screen.
The patron 'Alert Message' field no longer appears in the column picker as it was removed as part of the patron notes consolidation project released in 3.8.
Evergreen 3.11
I concur that the 'Alert Message' in the Check In column picker is the deprecated asset.copy_alert from the old style item alerts.
I also confirmed that the deprecated item 'Alert Message' appears in the experimental Angular Check In screen.
The patron 'Alert Message' field no longer appears in the column picker as it was removed as part of the patron notes consolidation project released in 3.8.
Updating the description for relevance.