You offline de-activated the TFS (not recommended): https://wyday.com/limelm/help/turbofloat-server-commandline/
Hence it succeeding the first time and not the second time.
Honestly: just use online activation / deactivation. It's easier to understand. And for 99.99% of customers it's the best way (even for ones that *insist* they need offline activation).
There will be a few edge-cases depending on your software (banks, military installations, etc.) but the majority of customers will be perfectly fine with online activations.