getting apt- get update to run on parrot os 4.11

i am trying to update my parrot OS(security) and it keeps throwing the error i’ve pasted below any help will be appreciated … thanks in advance

Hit:1 https://debrepo.freedownloadmanager.org bionic InRelease
Hit:2 https://deb.parrot.sh/parrot rolling InRelease
Hit:3 https://deb.parrot.sh/parrot rolling-security InRelease
Get:4 http://mirror.amberit.com.bd/parrotsec rolling InRelease [14.4 kB]
Err:4 http://mirror.amberit.com.bd/parrotsec rolling InRelease
The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY C7B39D0362972489
Reading package lists… Done
W: GPG error: http://mirror.amberit.com.bd/parrotsec rolling InRelease: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY C7B39D0362972489
E: The repository ‘http://mirror.amberit.com.bd/parrotsec 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.

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Hey, I made an account just to answer your question. You’re using apt-get right? Parrot os has documentation that says you shouldn’t apt-get essentially ever since parrot is a rolling release. Allow me to find the proper link for you, in which it shows you where you can update your sources list. This creates the proper signing key Hash and Key Verification - Parrot Documentation .

This is regarding updates: F.A.Q. - Parrot Documentation

For other questions I reccomend you read the entire start guide! I’m fairly new to linux as well, and using apt-get actually broke my parrot os install. Use synaptic to update packages after you add / change to new parrot repos / verify the keys. Good luck, and happpy hacking! Personally I install it as a functional and reasonably secure OS and I add tools as I go and as they suit my needs, coming from the home edition.

Start guide: https:// SPACE docs DOT parrotlinux DOT org/info/start/
(sorry, newbies can’t use more than two links haha)