Users are reporting a PG::UndefinedTable error regarding the missing translation_overrides relation during Discourse database migrations. jamesarobbo initially encountered this issue while attempting to run migrations on a production Heroku setup, noting that a similar problem was reportedly fixed previously. zogstrip suggested dropping and recreating the database, but jamesarobbo clarified that this is a production environment.
marcosbc identified the issue as a known problem affecting fresh startups in Kubernetes clusters and vanilla Discourse launcher setups. They provided logs showing the error occurring during rake db:migrate when the system attempts to query the translation_overrides table before it is fully established.
Eric_Keller provided a definitive root cause for automated restore pipelines: a version mismatch between the restored database backup and the current container code. The latest code references the translation_overrides model, but the older backup does not contain this table. The suggested solution is to rebuild the application first to create the necessary schema from scratch, and then perform the restore. This approach allows Discourse’s built-in restore process to properly handle the database structure, avoiding the migration conflict.
I have cloned master and in trying to run migrations i get this error:
ActiveRecord::StatementInvalid: PG::UndefinedTable: ERROR: relation “translation_overrides” does not exist
I see that a topic was created for this last November and seemingly fixed so i’m wondering what coudl be the cause?
ActiveRecord::StatementInvalid: PG::UndefinedTable: ERROR: relation "translation_overrides" does not exist
remote: LINE 5: WHERE a.attrelid = '"translation_overrides"':...
remote: ^
remote: : SELECT a.attname, format_type(a.atttypid, a.atttypmod),
remote: pg_get_expr(d.adbin, d.adrelid), a.attnotnull, a.atttypid, a.atttypmod
remote: FROM pg_attribute a LEFT JOIN pg_attrdef d
remote: ON a.attrelid = d.adrelid AND a.attnum = d.adnum
remote: WHERE a.attrelid = '"translation_overrides"'::regclass
remote: AND a.attnum > 0 AND NOT a.attisdropped
remote: ORDER BY a.attnum
PG::UndefinedTable: ERROR: relation "translation_overrides" does not exist
remote: LINE 5: WHERE a.attrelid = '"translation_overrides"':...
production but getting it to run on heroku (i realise that heroku is not the ‘supported’, ‘recommended’ setup ). despite that, do you have any ideas? thanks a lot
$ ./launcher rebuild app
...
I, [2021-05-27T10:53:27.612150 #1] INFO -- : > cd /var/www/discourse && su discourse -c 'bundle exec rake plugin:pull_compatible_all'
I, [2021-05-27T10:53:30.072954 #1] INFO -- : docker_manager 已是最新兼容版本
I, [2021-05-27T10:53:30.073194 #1] INFO -- : > cd /var/www/discourse && su discourse -c 'bundle exec rake db:migrate'
2021-05-27 10:53:32.977 UTC [4354] discourse@discourse ERROR: 关系 "translation_overrides" 不存在，位于字符 454
2021-05-27 10:53:32.977 UTC [4354] discourse@discourse STATEMENT: SELECT a.attname, format_type(a.atttypid, a.atttypmod),
pg_get_expr(d.adbin, d.adrelid), a.attnotnull, a.atttypid, a.atttypmod,
c.collname, col_description(a.attrelid, a.attnum) AS comment
FROM pg_attribute a
LEFT JOIN pg_attrdef d ON a.attrelid = d.adrelid AND a.attnum = d.adnum
LEFT JOIN pg_type t ON a.atttypid = t.oid
LEFT JOIN pg_collation c ON a.attcollation = c.oid AND a.attcollation <> t.typcollation
WHERE a.attrelid = '"translation_overrides"'::regclass
AND a.attnum > 0 AND NOT a.attisdropped
ORDER BY a.attnum
警告：未为 oid 19 的类型 "name" 定义类型转换。为安全起见，请将来显式将此类型转换为 TEXT。
> 正在初始化主题和配色方案
I, [2021-05-27T10:53:49.976589 #1] INFO -- : == 20000225050318 AddSchemaMigrationDetails: 正在迁移 ========================
...
I, [2026-05-20T07:59:01.413128 #1] INFO -- : > cd /var/www/discourse && su discourse -c 'bundle
exec rake db:migrate'
2026-05-20 07:59:09.214 UTC [1576] discourse@discourse ERROR: relation "translation_overrides" does not exist at character 523
2026-05-20 07:59:09.214 UTC [1576] discourse@discourse STATEMENT: SELECT a.attname, format_type(a.atttypid, a.atttypmod),
pg_get_expr(d.adbin, d.adrelid), a.attnotnull, a.atttypid, a.atttypmod,
c.collname, col_description(a.attrelid, a.attnum) AS comment,
attidentity AS identity,
attgenerated as attgenerated
FROM pg_attribute a
LEFT JOIN pg_attrdef d ON a.attrelid = d.adrelid AND a.attnum = d.adnum
LEFT JOIN pg_type t ON a.atttypid = t.oid
LEFT JOIN pg_collation c ON a.attcollation = c.oid AND a.attcollation <> t.typcollation
WHERE a.attrelid = '"translation_overrides"'::regclass
AND a.attnum > 0 AND NOT a.attisdropped
ORDER BY a.attnum
2026-05-20 07:59:13.167 UTC [1627] discourse@discourse ERROR: schema "discourse_functions" already exists
2026-05-20 07:59:13.167 UTC [1627] discourse@discourse STATEMENT: CREATE SCHEMA discourse_functions;
psql:/var/www/discourse/db/structure.sql:16: ERROR: schema "discourse_functions" already exists
rake aborted!
). despite that, do you have any ideas? thanks a lot