I'm trying to perform an 'apt-get update' and keep getting this error.
Traceback (most recent call last):
File "/usr/sbin/omv-mkaptidx", line 55, in <module>
cache = apt.cache.Cache()
File "/usr/lib/python3/dist-packages/apt/cache.py", line 102, in __init__
self.open(progress)
File "/usr/lib/python3/dist-packages/apt/cache.py", line 145, in open
self._cache = apt_pkg.Cache(progress)
SystemError: E:The value 'stable' is invalid for APT::Default-Release as such a release is not available in the sources
Reading package lists... Done
root@openmediavault:~#