Checksum error when openvas import the nasl scripts

I use the last 21.04 release of it and in the log file of openvas I found this error:

util gpgme:MESSAGE:2021-04-26 22h00.21 utc:3926134: Setting GnuPG dir to '/var/lib/greenbone/openvas/gnupg'
util gpgme:MESSAGE:2021-04-26 22h00.21 utc:3926134: Using OpenPGP engine version '2.2.20'
util gpgme:MESSAGE:2021-04-26 22h00.23 utc:3926151: Setting GnuPG dir to '/var/lib/greenbone/openvas/gnupg'
util gpgme:MESSAGE:2021-04-26 22h00.23 utc:3926151: Using OpenPGP engine version '2.2.20'
lib  nasl:WARNING:2021-04-26 22h00.23 utc:3926151: Erroneous or missing signature for checksums file /var/lib/greenbone/openvas/plugins/sha256sums
lib  nasl:WARNING:2021-04-26 22h00.23 utc:3926151: checksum for /var/lib/greenbone/openvas/plugins/gb_delta_electronics_cncsoft_a-series_smb_login_detect.nasl not matching
lib  nasl:WARNING:2021-04-26 22h00.23 utc:3926151: checksum for host_details.inc not matching
lib  nasl:WARNING:2021-04-26 22h00.23 utc:3926151: checksum for /var/lib/greenbone/openvas/plugins/gb_delta_electronics_cncsoft_a-series_parameditor_smb_login_detect.nasl not matching
lib  nasl:WARNING:2021-04-26 22h00.23 utc:3926151: checksum for /var/lib/greenbone/openvas/plugins/gb_sap_netweaver_as_java_http_detect.nasl not matching
lib  nasl:WARNING:2021-04-26 22h00.24 utc:3926151: checksum for /var/lib/greenbone/openvas/plugins/os_fingerprint.nasl not matching
lib  nasl:WARNING:2021-04-26 22h00.24 utc:3926151: checksum for /var/lib/greenbone/openvas/plugins/gb_emc_isilon_onefs_ntp_detect.nasl not matching
lib  nasl:WARNING:2021-04-26 22h00.24 utc:3926151: checksum for /var/lib/greenbone/openvas/plugins/gb_emc_isilon_onefs_consolidation.nasl not matching
lib  nasl:WARNING:2021-04-26 22h00.24 utc:3926151: checksum for /var/lib/greenbone/openvas/plugins/gb_delta_electronics_cncsoft_a-series_cncnetwork_smb_login_detect.nasl not matching
lib  nasl:WARNING:2021-04-26 22h00.24 utc:3926151: checksum for /var/lib/greenbone/openvas/plugins/gb_delta_electronics_cncsoft_a-series_mlceditor_smb_login_detect.nasl not matching
lib  nasl:WARNING:2021-04-26 22h00.24 utc:3926151: checksum for /var/lib/greenbone/openvas/plugins/2019/mongodb/gb_mongodb_SERVER-42233_win.nasl not matching
lib  nasl:WARNING:2021-04-26 22h00.24 utc:3926151: checksum for /var/lib/greenbone/openvas/plugins/2019/mongodb/gb_mongodb_SERVER-40563_lin.nasl not matching
lib  nasl:WARNING:2021-04-26 22h00.24 utc:3926151: checksum for /var/lib/greenbone/openvas/plugins/2019/mongodb/gb_mongodb_SERVER-38984_win.nasl not matching
lib  nasl:WARNING:2021-04-26 22h00.24 utc:3926151: checksum for /var/lib/greenbone/openvas/plugins/2019/mongodb/gb_mongodb_SERVER-38984_lin.nasl not matching
lib  nvticache:MESSAGE:2021-04-26 22h00.26 utc:3926150: Updated NVT cache from version 202104231026 to 202104261009

But the signature of the sha256sums file are correct:

gpg --homedir /var/lib/greenbone/openvas/gnupg --verify /var/lib/greenbone/openvas/plugins/sha256sums.asc
gpg: assuming signed data in ‘/var/lib/greenbone/openvas/plugins/sha256sums’
gpg: Signature made Mon 26 Apr 2021 12:09:45 PM CEST
gpg: using RSA key 9823FAA60ED1E580
gpg: Good signature from “Greenbone Community Feed integrity key” [ultimate]

Have anone an idear what goes wrong?

Thanks