Hi there!
Thanks for the feedback. yes, that’s what I tried several times already, but it did not (!) fix the issue.

zammad run rake db:migrate --trace

** Invoke db:migrate (first_time)
** Invoke db:load_config (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:load_config
** Execute db:migrate
== 20230726082734 SMIMEMetaInformationTable: migrating ========================
– change_table(:smime_certificates)
rake aborted!
StandardError: An error has occurred, all later migrations canceled:

No indexes found on smime_certificates with the options provided.
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/connection_adapters/abstract/schema_statements.rb:1411:in index_name_for_remove' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/connection_adapters/abstract/schema_statements.rb:881:in remove_index’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/connection_adapters/abstract/schema_definitions.rb:711:in remove_index' /opt/zammad/db/migrate/20230726082734_smime_meta_information_table.rb:24:in remove_columns’
/opt/zammad/db/migrate/20230726082734_smime_meta_information_table.rb:15:in block in migrate_table' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/connection_adapters/abstract/schema_statements.rb:490:in change_table’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:929:in block in method_missing' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:897:in block in say_with_time’
/opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/benchmark.rb:296:in measure' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:897:in say_with_time’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:918:in method_missing' /opt/zammad/db/migrate/20230726082734_smime_meta_information_table.rb:14:in migrate_table’
/opt/zammad/db/migrate/20230726082734_smime_meta_information_table.rb:8:in change' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:867:in exec_migration’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:851:in block (2 levels) in migrate' /opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/benchmark.rb:296:in measure’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:850:in block in migrate' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/connection_adapters/abstract/connection_pool.rb:462:in with_connection’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:849:in migrate' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1037:in migrate’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1329:in block in execute_migration_in_transaction' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1382:in ddl_transaction’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1328:in execute_migration_in_transaction' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1302:in each’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1302:in migrate_without_lock' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1251:in block in migrate’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1401:in block in with_advisory_lock' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1416:in block in with_advisory_lock_connection’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/connection_adapters/abstract/connection_pool.rb:462:in with_connection' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1416:in with_advisory_lock_connection’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1397:in with_advisory_lock' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1251:in migrate’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1086:in up' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1061:in migrate’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/tasks/database_tasks.rb:237:in migrate' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/railties/databases.rake:92:in block (3 levels) in ’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/railties/databases.rake:90:in each' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/railties/databases.rake:90:in block (2 levels) in ’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/task.rb:281:in block in execute' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/task.rb:281:in each’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/task.rb:281:in execute' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/task.rb:219:in block in invoke_with_call_chain’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/task.rb:199:in synchronize' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/task.rb:199:in invoke_with_call_chain’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/task.rb:188:in invoke' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:160:in invoke_task’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:116:in block (2 levels) in top_level' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:116:in each’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:116:in block in top_level' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:125:in run_with_threads’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:110:in top_level' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:83:in block in run’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:186:in standard_exception_handling' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:80:in run’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/exe/rake:27:in <top (required)>' /opt/zammad/vendor/bundle/ruby/3.1.0/bin/rake:25:in load’
/opt/zammad/vendor/bundle/ruby/3.1.0/bin/rake:25:in <top (required)>' /opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/cli/exec.rb:58:in load’
/opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/cli/exec.rb:58:in kernel_load' /opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/cli/exec.rb:23:in run’
/opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/cli.rb:486:in exec' /opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/vendor/thor/lib/thor/command.rb:27:in run’
/opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/vendor/thor/lib/thor/invocation.rb:127:in invoke_command' /opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/vendor/thor/lib/thor.rb:392:in dispatch’
/opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/cli.rb:31:in dispatch' /opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/vendor/thor/lib/thor/base.rb:485:in start’
/opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/cli.rb:25:in start' /opt/zammad/vendor/ruby-3.1.3/lib/ruby/gems/3.1.0/gems/bundler-2.3.26/libexec/bundle:48:in block in <top (required)>’
/opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/friendly_errors.rb:120:in with_friendly_errors' /opt/zammad/vendor/ruby-3.1.3/lib/ruby/gems/3.1.0/gems/bundler-2.3.26/libexec/bundle:36:in <top (required)>’
/opt/zammad/bin/bundle:121:in load' /opt/zammad/bin/bundle:121:in ’

Caused by:
ArgumentError: No indexes found on smime_certificates with the options provided.
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/connection_adapters/abstract/schema_statements.rb:1411:in index_name_for_remove' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/connection_adapters/abstract/schema_statements.rb:881:in remove_index’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/connection_adapters/abstract/schema_definitions.rb:711:in remove_index' /opt/zammad/db/migrate/20230726082734_smime_meta_information_table.rb:24:in remove_columns’
/opt/zammad/db/migrate/20230726082734_smime_meta_information_table.rb:15:in block in migrate_table' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/connection_adapters/abstract/schema_statements.rb:490:in change_table’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:929:in block in method_missing' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:897:in block in say_with_time’
/opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/benchmark.rb:296:in measure' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:897:in say_with_time’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:918:in method_missing' /opt/zammad/db/migrate/20230726082734_smime_meta_information_table.rb:14:in migrate_table’
/opt/zammad/db/migrate/20230726082734_smime_meta_information_table.rb:8:in change' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:867:in exec_migration’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:851:in block (2 levels) in migrate' /opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/benchmark.rb:296:in measure’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:850:in block in migrate' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/connection_adapters/abstract/connection_pool.rb:462:in with_connection’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:849:in migrate' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1037:in migrate’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1329:in block in execute_migration_in_transaction' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1382:in ddl_transaction’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1328:in execute_migration_in_transaction' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1302:in each’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1302:in migrate_without_lock' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1251:in block in migrate’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1401:in block in with_advisory_lock' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1416:in block in with_advisory_lock_connection’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/connection_adapters/abstract/connection_pool.rb:462:in with_connection' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1416:in with_advisory_lock_connection’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1397:in with_advisory_lock' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1251:in migrate’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1086:in up' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/migration.rb:1061:in migrate’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/tasks/database_tasks.rb:237:in migrate' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/railties/databases.rake:92:in block (3 levels) in ’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/railties/databases.rake:90:in each' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/activerecord-6.1.7.6/lib/active_record/railties/databases.rake:90:in block (2 levels) in ’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/task.rb:281:in block in execute' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/task.rb:281:in each’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/task.rb:281:in execute' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/task.rb:219:in block in invoke_with_call_chain’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/task.rb:199:in synchronize' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/task.rb:199:in invoke_with_call_chain’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/task.rb:188:in invoke' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:160:in invoke_task’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:116:in block (2 levels) in top_level' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:116:in each’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:116:in block in top_level' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:125:in run_with_threads’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:110:in top_level' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:83:in block in run’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:186:in standard_exception_handling' /opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/lib/rake/application.rb:80:in run’
/opt/zammad/vendor/bundle/ruby/3.1.0/gems/rake-13.0.6/exe/rake:27:in <top (required)>' /opt/zammad/vendor/bundle/ruby/3.1.0/bin/rake:25:in load’
/opt/zammad/vendor/bundle/ruby/3.1.0/bin/rake:25:in <top (required)>' /opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/cli/exec.rb:58:in load’
/opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/cli/exec.rb:58:in kernel_load' /opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/cli/exec.rb:23:in run’
/opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/cli.rb:486:in exec' /opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/vendor/thor/lib/thor/command.rb:27:in run’
/opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/vendor/thor/lib/thor/invocation.rb:127:in invoke_command' /opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/vendor/thor/lib/thor.rb:392:in dispatch’
/opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/cli.rb:31:in dispatch' /opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/vendor/thor/lib/thor/base.rb:485:in start’
/opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/cli.rb:25:in start' /opt/zammad/vendor/ruby-3.1.3/lib/ruby/gems/3.1.0/gems/bundler-2.3.26/libexec/bundle:48:in block in <top (required)>’
/opt/zammad/vendor/ruby-3.1.3/lib/ruby/3.1.0/bundler/friendly_errors.rb:120:in with_friendly_errors' /opt/zammad/vendor/ruby-3.1.3/lib/ruby/gems/3.1.0/gems/bundler-2.3.26/libexec/bundle:36:in <top (required)>’
/opt/zammad/bin/bundle:121:in load' /opt/zammad/bin/bundle:121:in ’
Tasks: TOP => db:migrate