fix migration - remove duplication

db/migrate/20220720214646_add_delete_cascade_from_orgs_down.rb

@@ -1,11 +1,9 @@
 class AddDeleteCascadeFromOrgsDown < ActiveRecord::Migration[7.0]
   def up
     add_foreign_key :schemes, :organisations, column: "owning_organisation_id", on_delete: :cascade
-    add_foreign_key :schemes, :organisations, column: "managing_organisation_id"
   end
 
   def down
-    remove_foreign_key :schemes, :organisations, column: "managing_organisation_id"
     remove_foreign_key :schemes, :organisations, column: "owning_organisation_id", on_delete: :cascade
   end
 end

db/schema.rb

@@ -383,7 +383,6 @@ ActiveRecord::Schema[7.0].define(version: 2022_08_02_125711) do
   add_foreign_key "case_logs", "organisations", column: "owning_organisation_id", on_delete: :cascade
   add_foreign_key "case_logs", "schemes", on_delete: :cascade
   add_foreign_key "locations", "schemes"
-  add_foreign_key "schemes", "organisations", column: "managing_organisation_id"
   add_foreign_key "schemes", "organisations", column: "owning_organisation_id", on_delete: :cascade
   add_foreign_key "users", "organisations", on_delete: :cascade
 end