If you no longer wish to offer a given plan to your customers, you should not delete it entirely from your service provider. Instead use the archived method when defining the plan. This will prevent new customers from choosing the plan but will allow existing customers to continue using the plan:
@psmail -- likewise.. I've been suffering angular2 hell for the past several months. Working on what essentially amounts of an alpha framework (because RC's constantly break the api) on a project headed for production is not fun. Especially when there's an almost total lack of documentation. I am really looking forward to getting back to working with laravel.