Fixes #3702 - One of DB migrations timestamp breaks migrations queue

.rubocop/cop/zammad/correct_migration_timestamp.rb

@@ -0,0 +1,35 @@
+# Copyright (C) 2012-2021 Zammad Foundation, http://zammad-foundation.org/
+
+module RuboCop
+  module Cop
+    module Zammad
+      # This cop checks if migration file name begins with a valid timestamp
+      # https://github.com/zammad/zammad/issues/3702
+      class CorrectMigrationTimestamp < Base
+        MSG = 'Migration filename must begin with a valid timestamp'.freeze
+
+        def on_new_investigation
+          file_path = processed_source.file_path
+
+          return if !migration?(file_path)
+          return if config.file_to_exclude?(file_path) || config.allowed_camel_case_file?(file_path)
+          return if filename_good?(file_path)
+
+          add_global_offense(MSG)
+        end
+
+        private
+
+        def migration?(file_path)
+          match_path? %r{(?<!spec/)db/(migrate|addon/[^/]+)/.+\.rb}, file_path
+        end
+
+        def filename_good?(file_path)
+          File
+            .basename(file_path)
+            .match? %r{^20\d{12}_}
+        end
+      end
+    end
+  end
+end

.rubocop/rubocop_zammad.rb

@@ -3,6 +3,7 @@
 require_relative 'cop/zammad/exists_condition'
 require_relative 'cop/zammad/exists_date_time_precision'
 require_relative 'cop/zammad/exists_reset_column_information'
+require_relative 'cop/zammad/correct_migration_timestamp'
 require_relative 'cop/zammad/have_no_over_not_to'
 require_relative 'cop/zammad/no_to_sym_on_string'
 require_relative 'cop/zammad/prefer_negated_if_over_unless'

db/migrate/20210407000001_setting_add_internal_article_check.rb

@@ -6,6 +6,12 @@ class SettingAddInternalArticleCheck < ActiveRecord::Migration[5.2]
     # return if it's a new setup
     return if !Setting.exists?(name: 'system_init_done')
 
+    # this migration used to have a wrong timestmap
+    # remove old timestmap from schema_migrations table
+    # when re-running with the fixed timestamp
+    # https://github.com/zammad/zammad/issues/3702
+    return if ActiveRecord::SchemaMigration.where(version: '202104070000001').destroy_all.present?
+
     Setting.create_if_not_exists(
       title:       'Define postmaster filter.',
       name:        '5500_postmaster_internal_article_check',