Error pg_upgrade version 11 to 15

Hello!

-bash-4.2$ /usr/pgsql-15/bin/pg_upgrade --old-datadir=/var/lib/pgsql/11/data --new-datadir=/var/lib/pgsql/15/data --old-bindir=/usr/pgsql-11/bin --new-bindir=/usr/pgsql-15/bin
Performing Consistency Checks
-----------------------------
Checking cluster versions ok
Checking database user is the install user ok
Checking database connection settings ok
Checking for prepared transactions ok
Checking for system-defined composite types in user tables ok
Checking for reg* data types in user tables ok
Checking for contrib/isn with bigint-passing mismatch ok
Checking for removed "abstime" data type in user tables ok
Checking for removed "reltime" data type in user tables ok
Checking for removed "tinterval" data type in user tables ok
Checking for user-defined encoding conversions ok
Checking for user-defined postfix operators ok
Checking for incompatible polymorphic functions ok
Checking for tables WITH OIDS ok
Checking for invalid "sql_identifier" user columns ok
Creating dump of global objects ok
Creating dump of database schemas
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

If pg_upgrade fails after this point, you must re-initdb the
new cluster before continuing.

Performing Upgrade
------------------
Analyzing all rows in the new cluster ok
Freezing all rows in the new cluster ok
Deleting files from new pg_xact ok
Copying old pg_xact to new server ok
Setting oldest XID for new cluster ok
Setting next transaction ID and epoch for new cluster ok
Deleting files from new pg_multixact/offsets ok
Copying old pg_multixact/offsets to new server ok
Deleting files from new pg_multixact/members ok
Copying old pg_multixact/members to new server ok
Setting next multixact ID and offset for new cluster ok
Resetting WAL archives ok
Setting frozenxid and minmxid counters in new cluster ok
Restoring global objects in the new cluster ok
Restoring database schemas in the new cluster
template1
*failure*

Consult the last few lines of "/var/lib/pgsql/15/data/pg_upgrade_output.d/20250818T162430.400/log/pg_upgrade_dump_18344416.log" for
the probable cause of the failure.
Failure, exiting
-bash-4.2$ cat /var/lib/pgsql/15/data/pg_upgrade_output.d/20250818T162430.400/log/pg_upgrade_dump_18344416.log
command: "/usr/pgsql-15/bin/pg_dump" --host /var/lib/pgsql/15/data --port 50432 --username postgres --schema-only --quote-all-identifiers --binary-upgrade --format=custom --file="/var/lib/pgsql/15/data/pg_upgrade_output.d/20250818T162430.400/dump/pg_upgrade_dump_18344416.custom" 'dbname=template1' >> "/var/lib/pgsql/15/data/pg_upgrade_output.d/20250818T162430.400/log/pg_upgrade_dump_18344416.log" 2>&1

command: "/usr/pgsql-15/bin/pg_restore" --host /var/lib/pgsql/15/data --port 50432 --username postgres --clean --create --exit-on-error --verbose --dbname postgres "/var/lib/pgsql/15/data/pg_upgrade_output.d/20250818T162430.400/dump/pg_upgrade_dump_18344416.custom" >> "/var/lib/pgsql/15/data/pg_upgrade_output.d/20250818T162430.400/log/pg_upgrade_dump_18344416.log" 2>&1
pg_restore: connecting to database for restore
pg_restore: dropping DATABASE PROPERTIES template1
pg_restore: dropping DATABASE template1
pg_restore: while PROCESSING TOC:
pg_restore: from TOC entry 3677; 1262 18344416 DATABASE template1 postgres
pg_restore: error: could not execute query: ERROR: cannot drop a template database
Command was: DROP DATABASE "template1";

Regards

Ivan Humanes

Database Administrator

[cid:2ed07e75-f2dd-4729-a46e-efb9b7f12e84]

Fujitsu Technology Solutions S.A.

Camino Cerro de los Gamos, 1 - 28224 - Pozuelo de Alarcón, Madrid, Spain

Móvil: +34 615 84 09 99

E-mail: ivan(dot)humanescabanas(at)fujitsu(dot)com<mailto:ivan(dot)humanescabanas(dot)external(at)fijitsu(dot)com>