SystemError: E:The value 'stable' is invalid for APT::Default-Release as such a release is not available in the sources "Version 1.17 Kralizec"

Hello Friends of OMV

sorry, i am a noob and i can´t update my system. I get the Error: SystemError: E:The value 'stable' is invalid for APT::Default-Release as such a release is not available in the sources

have anyone a idea ?

THX

root@NAS:~# grep -r "stable" /etc/apt/*

/etc/apt/apt.conf.d/99openmediavault-release:APT::Default-Release "stable";

root@NAS:~# dpkg -l | grep openmediavault

ii openmediavault 1.17 all Open network attached storage solution

ii openmediavault-autoshutdown 1.0.8 all OpenMediaVault AutoShutdown Plugin

ii openmediavault-clamav 1.3 all OpenMediaVault ClamAV plugin

ii openmediavault-extplorer 1.1 all OpenMediaVault eXtplorer plugin

ii openmediavault-keyring 0.3 all GnuPG archive keys of the OpenMediaVault archive

ii openmediavault-netatalk 1.5 all OpenMediaVault netatalk (AppleTalk Protocol Suite) plugin

ii openmediavault-omvextrasorg 1.17 all OMV-Extras.org Package Repositories for OpenMediaVault

pc openmediavault-owncloud 1.3 all OpenMediaVault ownCloud plugin

ii openmediavault-plexmediaserver 1.0.10 all OpenMediaVault Plex Media Server plugin

ii openmediavault-shairport 1.4 all OpenMediaVault shairport (AirPlay/RAOP receiver) plugin

ii openmediavault-usbbackup 1.3 all OpenMediaVault USB/eSATA backup plugin

ii openmediavault-wol 1.0.2 all OpenMediaVault WOL plugin

root@NAS:~#

This was good THX

I don't have that file on any of my systems either.As root:mv /etc/apt/apt.conf.d/99openmediavault-release /root/apt-get updateIf no errors, delete the file:rm /root/99openmediavault-release