PyFlink CDC Connectors Postgres failure - postgresql

Question

Trying to follow the Flink CDC Connectors Postgres tutorial using PyFlink:
https://ververica.github.io/flink-cdc-connectors/master/content/quickstart/mysql-postgres-tutorial.html
Failing Code
ddl = """
CREATE TABLE shipments (
shipment_id INT,
order_id INT,
origin STRING,
destination STRING,
is_arrived BOOLEAN
) WITH (
'connector' = 'postgres-cdc',
'hostname' = 'localhost',
'port' = '5432',
'username' = 'postgres',
'password' = 'postgres',
'database-name' = 'postgres',
'schema-name' = 'public',
'slot.name' = 'slot2',
'table-name' = 'shipments'
);
"""
table_env.execute_sql(ddl)
table2: Table = table_env.sql_query("SELECT * FROM shipments")
table2.execute().print()
Main Stacktrace
Caused by: io.debezium.DebeziumException: Creation of replication slot failed
at io.debezium.connector.postgresql.PostgresConnectorTask.start(PostgresConnectorTask.java:141)
at io.debezium.connector.common.BaseSourceTask.start(BaseSourceTask.java:130)
at io.debezium.embedded.EmbeddedEngine.run(EmbeddedEngine.java:759)
at io.debezium.embedded.ConvertingEngineBuilder$2.run(ConvertingEngineBuilder.java:188)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: org.postgresql.util.PSQLException: ERROR: syntax error at or near "CREATE_REPLICATION_SLOT"
Position: 1
Troubleshooting
CDC needs access to Postgres' WAL, write ahead log. In order to get the WAL Postgres needs to have a replication slot. So you need to set this up in Postgres, I got that done with this command:
ALTER SYSTEM SET wal_level = logical
SELECT * FROM pg_create_logical_replication_slot('slot2', 'test_decoding')
Then restart Postgres.
CDC code that get the replication slot
jdbcConnection.getReplicationSlotState(connectorConfig.slotName(), connectorConfig.plugin().getPostgresPluginName());
called from:
https://github.com/debezium/debezium/blob/main/debezium-connector-postgres/src/main/java/io/debezium/connector/postgresql/PostgresConnectorTask.java
When that doesn't work you it will try to create the replication slot and that is where the exception is thrown.
Possible version issue
Maybe the problem is that I am running Postgres 13 and Ververica CDC might only support up to Postgres 12.