Default Sort order Problem - Newbie ;-)

Here’s what i did to solve the Problem:

sudo -u postgres psql postgres
postgres=> \list
List of databases
Name | Owner | Encoding | Collate | Ctype | ICU Locale | Locale Provider | Access privileges
-----------+----------+----------+-------------+-------------+------------+-----------------+-----------------------
postgres | postgres | UTF8 | de_DE.UTF-8 | de_DE.UTF-8 | | libc |
template0 | postgres | UTF8 | de_DE.UTF-8 | de_DE.UTF-8 | | libc | =c/postgres +
| | | | | | | postgres=CTc/postgres
template1 | postgres | UTF8 | de_DE.UTF-8 | de_DE.UTF-8 | | libc | =c/postgres +
| | | | | | | postgres=CTc/postgres

postgres=# ALTER DATABASE postgres REFRESH COLLATION VERSION;
HINWEIS: Version wird von 2.35 in 2.36 geändert
ALTER DATABASE
postgres=# ALTER DATABASE template0 REFRESH COLLATION VERSION;
FEHLER: invalid collation version change
postgres=# ALTER DATABASE template1 REFRESH COLLATION VERSION;
HINWEIS: Version wird von 2.35 in 2.36 geändert
ALTER DATABASE
postgres=# exit

What was the error?

I did not work on the right database.

Thx again for bringing me on the Right path.

PWO