Hello,
You have to make sure the UUID matches. After you made those modifications most likely the UUID’s changed. From terminal you can see:
lsblk -fi
Then you edit the /etc/fstab as administrator, or since you are on KDE Plasma, opening it with Kate and change it, you will be prompted to provide the password to save it.
Then you have to make sure the resume=UUID=... with the proper UUID is also present in /etc/default/grub file in the GRUB_CMDLINE_LINUX_DEFAULT line.
Once you changed the grub file, you run from terminal:
sudo update-grub
If you don’t want any resume thing, then remove that entry from grub file i mentioned and also remove re resume HOOK in the /etc/mkinitcpio.conf file and then also run:
sudo mkinitcpio -P
and
sudo update-grub