大家好，这似乎是同一个问题：https://meta.discourse.org/t/migration-error-on-fresh-startup-running-in-k8s-cluster/184751。我们在使用官方的 standalone.yml 模板 部署 Discourse 的独立启动器（launcher）环境时，成功复现了该问题：
$ ./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 ========================
...