Researching ASDF issue

SBCL is free software, provided as is, with absolutely no warranty.
It is mostly in the public domain; some portions are provided under
BSD-style licenses.  See the CREDITS and COPYING files in the
distribution for more information.
WARNING:
   You are using ASDF version 3.3.1 (probably from (require "asdf") or loaded
   by quicklisp) and have an older version of ASDF 3.1.7 registered at
   #P"/usr/share/common-lisp/source/cl-asdf/asdf.asd". Having an ASDF installed
   and registered is the normal way of configuring ASDF to upgrade itself, and
   having an old version registered is a configuration error. ASDF will ignore
   this configured system rather than downgrade itself. In the future, you may
   want to either: (a) upgrade this configured ASDF to a newer version, (b)
   install a newer ASDF and register it in front of the former in your
   configuration, or (c) uninstall or unregister this and any other old version
   of ASDF from your configuration. Note that the older ASDF might be
   registered implicitly through configuration inherited from your system
   installation, in which case you might have to specify
   :ignore-inherited-configuration in your in your
   ~/.config/common-lisp/source-registry.conf or other source-registry
   configuration file, environment variable or lisp parameter. Indeed, a likely
   offender is an obsolete version of the cl-asdf debian or ubuntu package,
   that you might want to upgrade (if a recent enough version is available) or
   else remove altogether (since most implementations ship with a recent asdf);
   if you lack the system administration rights to upgrade or remove this
   package, then you might indeed want to either install and register a more
   recent version, or use :ignore-inherited-configuration to avoid registering
   the old one. Please consult ASDF documentation and/or experts.