If you haven't done anything else (rebooted, copied again etc), "pasting" might still work if the files remain on the clipboard.
As you've discovered, it's safer to copy & paste, then delete the originals than to cut & paste.
OnePlus 5T review: Hands-on
Illustrator Andrés Lozano on his improv line work, brazen use of colours & hand sketching
iPhone X review
Comment envoyer gratuitement des gros fichiers ?