termux error kali@root

[Brunobrahm2]

Decompressing Rootfs, please be patient.
writing launch script
fixing shebang of start-kali.sh
making start-kali.sh executable
removing image for some space
You can now launch Kali with the ./start-kali.sh script
~ $ ls
kali-binds kali.sh storage
kali-fs start-kali.sh
~ $ bash start-kali.sh
root@localhost:# apt update && pkg upgrade -y
Get:1 http://mirror.fsmg.org.nz/kali kali-rolling InRelease [30.5 kB]
Err:1 http://mirror.fsmg.org.nz/kali kali-rolling InRelease
The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository devel@kali.org
Reading package lists... Done
W: GPG error: http://mirror.fsmg.org.nz/kali kali-rolling InRelease: The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository devel@kali.org
E: The repository 'http://mirror.fsmg.org.nz/kali kali-rolling InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
root@localhost:# apt update
Get:1 http://mirror.fsmg.org.nz/kali kali-rolling InRelease [30.5 kB]
Err:1 http://mirror.fsmg.org.nz/kali kali-rolling InRelease
The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository devel@kali.org
Reading package lists... Done
W: GPG error:http://mirror.fsmg.org.nz/kali kali-rolling InRelease: The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository devel@kali.org
E: The repository 'http://mirror.fsmg.org.nz/kali kali-rolling InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
root@localhost:~#

Recentement my termux had problems with root @ kali using when I bash start-kali.sh it goes more when and to give apt update && pkg upgrade -y it gives a wpg error any can help me how to solve this

:W: GPG error:
:E: The repository:
:N: Updating:
N: See apt-secure: