When creating a service using the Toolbox the creation will fail with a HTTP 422 error if the system name matches a previously deleted service.
{ "code": "E_3SCALE_API", "message": "Service has not been created. Errors: {\"system_name\"=>[\"has already been taken\"]}", "class": "ThreeScaleToolbox::ThreeScaleApiError" }
UI behaviour and current API/Toolbox behaviour for service creation will successfully create new services under the same circumstances.
This has been reproduced using 0.17 and 0.19 versions of Toolbox.