PostgreSQL Upgrade 11 to 12

Hi everyone,
I want to upgrade the postgresql cluster. The structure I use is streaming replication method on 2 nodes(one master, one slave). The version I want to upgrade is 11 to 12.
but I am getting the following error during the upgrade. Can you support me? Thanks.

-bash-4.2$ /usr/pgsql-12/bin/pg_upgrade --old-datadir=/var/lib/pgsql/11/data --new-datadir=/var/lib/pgsql/12/data --old-bindir=/usr/pgsql-11/bin --new-bindir=/usr/pgsql-12/bin --check
Performing Consistency Checks on Old Live Server
------------------------------------------------
Checking cluster versions ok
Checking database user is the install user ok
Checking database connection settings ok
Checking for prepared transactions ok
Checking for reg* data types in user tables ok
Checking for contrib/isn with bigint-passing mismatch ok
Checking for tables WITH OIDS ok
Checking for invalid "sql_identifier" user columns ok
Checking for presence of required libraries ok
Checking database user is the install user ok
Checking for prepared transactions ok
Checking for new cluster tablespace directories ok
Error;
-bash-4.2$ /usr/pgsql-12/bin/pg_upgrade --old-datadir=/var/lib/pgsql/11/data --new-datadir=/var/lib/pgsql/12/data --old-bindir=/usr/pgsql-11/bin --new-bindir=/usr/pgsql-12/bin
Performing Consistency Checks
-----------------------------
Checking cluster versions ok

The source cluster was shut down while in recovery mode. To upgrade, use "rsync" as documented or shut it down as a primary.
Failure, exiting