Because during the internship period, the driver's license was cancelled from the internship qualification.

Provisions on the application and use of motor vehicle driver's license;

Seventy-ninth motor vehicle drivers in the internship period of road traffic safety violation record 12 points, cancel their internship driving qualification. If the cancelled driving qualification does not belong to the highest permitted driving type, it shall also be cancelled in accordance with the provisions of the first paragraph of Article 78.

Drivers with driver's licenses for buses, tractors, city buses, medium-sized buses and large trucks who scored more than 6 points during the internship period of 1 year but did not reach 12 points will have their internship period extended 1 year. If you get more than 6 points again during the extended internship period but fail to reach 12 points, your internship driving qualification will be cancelled.

Scoring scores of road traffic safety violations;

1. If the motor vehicle driver commits one of the following illegal acts, score 12:

(a) driving a motor vehicle that does not meet the requirements for driving;