Getting "Purchased failed" when trying to purchase an active subscription

### Platform

- [x] iOS
- [ ] macOS
- [ ] tvOS

### In app purchase type

- [ ] Consumable
- [ ] Non-consumable
- [x] Auto-Renewable Subscription
- [ ] Non-Renewing Subscription

### Environment

- [x] Sandbox
- [maybe] Production

### Version
0.5.1

## Report

### Issue summary
Getting from SwiftyStoreKit "Purchased failed" when trying to purchase an active subscription.

### What did you expect to happen
expected to get "purchased successfully".
The best scenario would be to create another state like "already active".

### What happened instead
Get "purchased failed"