License clarification

[juliancheal]

Are you able to clarify the license situation with this repository?

It seems the original Chargebee repository that this code is based on is licensed as MIT.

However this repository has both MIT and GNU GPL Version 3. The GPL license was added with an initial commit, along with a .gitignore file, which appears as though they were just added upon creating this repository.

Then when the original Chargebee code was added, in First Commit the MIT license was added.

So the question is, were both licenses added to
A) Dual license this code
B) License Chargebee's original code under MIT, and any subsequent code under GPL
C) The GPL license added by mistake

Any clarification would be very helpful.