Tesla Inc. sales kept sliding across Europe’s biggest electric-car markets in April, despite the company rolling out an updated version of its most popular vehicle.

Tesla sales tumbled in April in key European markets of Germany and the U.K., according to data released Tuesday.

The Tesla Model Y has previously held the title of the world’s best-selling electric vehicle and remains a core model for the company. However, despite the launch of its updated version, sluggish sales continue,