How to change file to be debugged in phpstorm?

I made a breakpoint in fileA, run debbuger and Phpstorm asked me to choose a file from list to start debug. I choose fileB - not this with breakpoint just to check what will happen.

And it start debbuging fileB.

But now I want to realy debug fileA, and with new debug Phpstorm not asking me to choose file from the list, it always choose fileB.

How to change this behaviour? How to change file to be debugged in phpstorm?

This occur on Ubuntu, I have never saw this behaviour in Windows.