Going back to the original images may be quicker 🙂
But it is possible...
1. In your original table, make sure you have some sort of unique ID field
2. In the original attachments table, join this ID field to the attachment table using objectid
3. Use Display XY data as described on the original table
4. Enable attachments on the now created new feature class
5. Add the ID field to the new attachment table
6. Append the old attachment table to the new feature class attachment table
7. Join the objectids from the new feature class to the new attachment table using the ID field
8. Recalculate the parent objectids
9. Delete the excessive fields from the feature class
Your new feature class now has the correct attachments!