Partioning error in Systemd distro

Munawar

Hello,

I am using Up-board, I have built the image using Yocto-Pyro.
By default the Image is managed by systemV, I have added systemd by adding the line DISTRO_FEATURES_append = " systemd" in my local.conf file.
I build the image, the image booted and worked.
Now what I am trying to do is to make partition in external SD-card using parted utility. The partions fs is ext4.
(Partioning script)
yes | /usr/sbin/parted --script /dev/sda -- \
mklabel gpt \
mkpart primary ext4 1Mib 256Mib \
mkpart primary ext4 256Mib 512Mib \
mkpart primary ext4 512Mib 640Mib \
mkpart primary ext4 640Mib 768Mib \
mkpart primary ext4 768Mib 100%

While doing this I am getting an strange error that I could not figure out.
Error: Partition(s) 1, 2, 3, 4, 5 on /dev/sda have been written, but we have been unable to inform the kernel of the change, probably because it/they are in use. As a result, the old partition(s) will remain in use. You should reboot now before making further changes.

Does anybody know how to encounter this error?

Thanks
Munawar Ali