cloud provider upload: 404 Not Found - Resource not found on undefined version

[Mno-hime]

vagrant cloud provider upload ends with a backtrace, when the version (i.e. 3) does not exist:

$ /opt/vagrant/bin/vagrant cloud provider upload mnowak/test qemu 3 centos-7-x86_64_box.box
/opt/vagrant/embedded/gems/2.2.6/gems/vagrant_cloud-2.0.3/lib/vagrant_cloud/client.rb:56:in `rescue in request': 404 Not Found - Resource not found! (VagrantCloud::ClientError)
	from /opt/vagrant/embedded/gems/2.2.6/gems/vagrant_cloud-2.0.3/lib/vagrant_cloud/client.rb:51:in `request'
	from /opt/vagrant/embedded/gems/2.2.6/gems/vagrant_cloud-2.0.3/lib/vagrant_cloud/provider.rb:108:in `upload_url'
	from /opt/vagrant/embedded/gems/2.2.6/gems/vagrant-2.2.6/plugins/commands/cloud/provider/upload.rb:54:in `upload_provider'
	from /opt/vagrant/embedded/gems/2.2.6/gems/vagrant-2.2.6/plugins/commands/cloud/provider/upload.rb:42:in `execute'
	from /opt/vagrant/embedded/gems/2.2.6/gems/vagrant-2.2.6/plugins/commands/cloud/provider/root.rb:46:in `execute'
	from /opt/vagrant/embedded/gems/2.2.6/gems/vagrant-2.2.6/plugins/commands/cloud/root.rb:73:in `execute'
	from /opt/vagrant/embedded/gems/2.2.6/gems/vagrant-2.2.6/lib/vagrant/cli.rb:66:in `execute'
	from /opt/vagrant/embedded/gems/2.2.6/gems/vagrant-2.2.6/lib/vagrant/environment.rb:290:in `cli'
	from /opt/vagrant/embedded/gems/2.2.6/gems/vagrant-2.2.6/bin/vagrant:182:in `<main>'

It wasn't imminently clear to me what's the problem.

I run official Vagrant 2.2.6 RPM on Fedora 31.