Updating gpg key

Get:1 In Release [7,737 B] Get:2 In Release [12.5 k B] Err In Release Err In Release Fetched 2 B in 0s (6 B/s) Reading package lists... W: A error occurred during the signature verification.

Undo all the changes you've made to /etc/apt/and files in /etc/apt/d before you destroy your Raspian installation.o You need a Passphrase to protect your secret key. gpg: key 6AA15948 marked as ultimately trusted public and secret key created and signed. gpg: 3 marginal(s) needed, 1 complete(s) needed, classic trust model gpg: depth: 0 valid: 3 signed: 0 trust: 0-, 0q, 0n, 0m, 0f, 3u pub 4096R/6AA15948 2009-05-10 Key fingerprint = 7A33 ECAA 188B 96F2 7C91 7288 B346 4F89 6AA1 5948 uid Ana Beatriz Guerrero López setpref SHA512 SHA384 SHA256 SHA224 AES256 AES192 AES CAST5 ZLIB BZIP2 ZIP Uncompressed Set preference list to: Cipher: AES256, AES192, AES, CAST5, 3DES Digest: SHA512, SHA384, SHA256, SHA224, SHA1 Compression: ZLIB, BZIP2, ZIP, Uncompressed Features: MDC, Keyserver no-modify Really update the preferences?(y/N) y gpg: WARNING: no user ID has been marked as primary.gpg --keyserver keys.--recv-key x0x0x0x0x0x0x0x0 gpg -a --export x0x0x0x0x0x0x0x0 | sudo apt-key add - Problem solved!After doing an update today I got the same error: W: GPG error: Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY DEF2A2198183CBB5 I tried Resulting: gpg: requesting key 8183CBB5 from hkp server keyserver.gpgkeys: key DEF2A2198183CBB5 not found on keyserver gpg: no valid Open PGP data found.

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