While replacing my driveshaft axle, I took the brake caliper off (pretty easy, car was in Drive with no e-brake engaged) so I can have more working space.
After installing the new driveshaft, I started the car and pressed the brake pedal a couple of times (while caliper was still disconnected).
Then I installed the caliper on (it was kinda hard, I had to hammer it a couple of times because I think the brake pads remained in the "brake" position).
After that, I put the wheel back on, started the car, and noticed that the car is a little bit sluggish... So I jacked up the wheel again, and it seems that the brakes are applied (I can still move the wheel by hand, but very hard).
How to fix this?