swap problem

mkswap /dev/sda1
mkswap: /dev/sda1: warning: wiping old swap signature.
Setting up swapspace version 1, size = 975840 KiB
no label, UUID=774c0fde-84eb-4872-876a-a49145218749

swapon /dev/sda1
swapon: /dev/sda1: read swap header failed

swapon -f /dev/sda1
swapon: /dev/sda1: read swap header failed

parted print
Number  Start   End     Size    File system     Name     Flags
 1      1049kB  1000MB  999MB   linux-swap(v1)  primary
 3      1000MB  4000MB  3000MB  ext4            primary
 2      4000MB  6001GB  5997GB  ext4            primary


cat /etc/fstab
/dev/sda3 / ext4 defaults,noatime 0 1
/dev/sda2 /data ext4 rw,user,auto,async 0 2