Are you allowed to change the lane in this place?

In the photo you are driving onto a pedestrian crossing marked with D-6 signs on both sides of the roadway, and the lanes before the crossing and at the crossing are separated by solid line P-2. You must not change lanes here - you must not cross a solid line or drive onto it. The answer is: no.

The Regulation on road signs and signals says that P-2 separates lanes going in the same direction and means a ban on crossing this line. A solid line is painted at crossings precisely so that drivers do not change lanes where a pedestrian may step onto the roadway from behind a car in the next lane. You choose your lane before the crossing, on the section with a broken line, and keep it until the line becomes broken again.

Legal basis: § 86 para. 3 of the Regulation on road signs and signals; Art. 26 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)