class RemoveGeniModels < ActiveRecord::Migration[6.1]
  def up
    drop_table :geniverse_activities
    drop_table :geniverse_articles
    drop_table :geniverse_cases
    drop_table :geniverse_dragons
    drop_table :geniverse_help_messages
    drop_table :geniverse_unlockables
    drop_table :geniverse_users
  end

  def down
    # no going back!
    raise ActiveRecord::IrreversibleMigration
  end
end

class RemoveGeniModels < ActiveRecord::Migration[6.1]
  def up
    drop_table :geniverse_activities, :if_exists => true
    drop_table :geniverse_articles, :if_exists => true
    drop_table :geniverse_cases, :if_exists => true
    drop_table :geniverse_dragons, :if_exists => true
    drop_table :geniverse_help_messages, :if_exists => true
    drop_table :geniverse_unlockables, :if_exists => true
    drop_table :geniverse_users, :if_exists => true
  end

  def down
    # no going back!
    raise ActiveRecord::IrreversibleMigration
  end
end

Add `:if_exists => true` to RemoveGeniModels Migration
Add `:if_exists => true` to RemoveGeniModels Migration
