I also get:

guix system: warning: Your Guix installation is 9 days old.
guix system: warning: Consider running 'guix pull' followed by

but I reconfigured some minutes ago

I also get

substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'...

substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'...
100.0%
guix system: error: guile-ssh-rexec-bug.patch: patch not found

How do I know which one is the one produced by the last reconfiguration ?

ls /gnu/store/ | grep guix-latest
1kpv2436gvlgdamq7fmzfmij4j1k04xk-guix-latest.lock
5z8z049ka64d0j5wcgr8lki4d7hycxjr-guix-latest-builder
9691ssj634qv17lkjsbw45dr22f3ba1w-guix-latest-builder
a83466xb67y1yha02cshkv2mq7x5ja04-guix-latest/
bzppcl2260jf7xmgclg21q7173b5zw52-guix-latest.drv
f4j7wi1ibnknsw83z7ls93z5iky3cjbp-guix-latest.drv
f62qraqvqh3pijg016r83z95m86jqm4d-guix-latest-builder
fw5h2c7b53v95ly9fwv5737yi48a322b-guix-latest/
fwyfhrrzn5xiajp51ca6fd5yfzbsb77x-guix-latest/
hlhk104mr0l9afikgcfvm4pyvyy7dq1k-guix-latest.tar.gz
iszc1y4rbibcv11hx95mrh7fm7rc7sr6-guix-latest.drv
l97q3xqsgf7ij0wsmw5nvqcd2k8fragh-guix-latest/
lqfi09gxk2zip7gznl69vl0mqh938691-guix-latest/
m5giwvvx866hhlh8241vqv9ld3za3gxf-guix-latest/
ndgh0amcnn7kv6z6837jd9gqrm0gyyff-guix-latest.drv
nkjg85v9sl3v8dvdz6bk8gwix58vwrz6-guix-latest.tar.gz
nsr2a5rp140z9lgzy06ffp05y81w45ia-guix-latest-builder
pxcm3zya7ygszbksrcgpr2fv9c61n0p3-guix-latest.drv
q1i2hba18ang1caw1i263c0w8gyjgxr8-guix-latest-builder
q2ybh27mbw2cfgh67by32lzhly1dbw26-guix-latest.drv
r28a6ckhdkz79qnk7sspm0rv83kg88a8-guix-latest-builder
rhyp8rw8xn1y4h6z1bgbf6c1q4m8vaah-guix-latest.tar.gz
rs6kpnglkskniv4f8a7hiqz5m6r8a3p4-guix-latest.drv
wa19n207pqfpg8pa69v8ndfmpfpphsrr-guix-latest-builder
wmara0ilcca5552dabqac6vnfp9hvn1k-guix-latest-builder
x235iqrxgizfyr7mw897cv7a4hq0vm24-guix-latest.drv
x4113k0z54fpa5gpwnwbsvlhk6asycn0-guix-latest/
zdzpc2d0xpafxp0rc80578l3s9h814dn-guix-latest.tar.gz