(base) C:\Users\[username]>conda update anaconda

PackageNotInstalledError: Package is not installed in prefix.
  prefix: C:\Users\robin\anaconda3
  package name: anaconda

(base) C:\Users\[username]>conda env list
# conda environments:
#
base                  *  C:\Users\robin\anaconda3

(base) C:\Users\[username]>conda info

     active environment : base
    active env location : C:\Users\robin\anaconda3
            shell level : 1
       user config file : C:\Users\robin\.condarc
 populated config files : C:\Users\robin\.condarc
          conda version : 23.5.1
    conda-build version : 3.25.0
         python version : 3.11.3.final.0
       virtual packages : __archspec=1=x86_64
                          __win=0=0
       base environment : C:\Users\robin\anaconda3  (writable)
      conda av data dir : C:\Users\robin\anaconda3\etc\conda
  conda av metadata url : None
           channel URLs : https://repo.anaconda.com/pkgs/main/win-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/r/win-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://repo.anaconda.com/pkgs/msys2/win-64
                          https://repo.anaconda.com/pkgs/msys2/noarch
          package cache : C:\Users\robin\anaconda3\pkgs
       envs directories : C:\Users\robin\anaconda3\envs
                          C:\Users\robin\.conda\envs
                          C:\Users\robin\AppData\Local\conda\conda\envs
               platform : win-64
             user-agent : conda/23.5.1 requests/2.29.0 CPython/3.11.3 Windows/10 Windows/10.0.22621
          administrator : False
             netrc file : None
           offline mode : False