Deleting multiple hosts more than 20 using "Delete Hosts" option from foreman v2.1 UI throws a proxy exception

**Problem: While deleting multiple hosts more than 20 from host listing using “Delete Hosts” option it’s throwing an proxy exception. Exception message is added as attachmentproxy_error_on_multiple_host_delete . If you delete less than 20 it’s not throwing any proxy exception & redirecting successfully to host listing page. Please verify.

Any suggestion in which version of foreman this issue will be fixed?

**Expected outcome: After deleting all hosts it should redirect to host listing page.

**Foreman and Proxy versions: 2.1.0-rc3