Wheels are blocked – what to do?

Hello guys! Well, my car was on a lift today, and I noticed the following: Two wheels seem to be easy to “stitch”, i.e. I can’t turn them with momentum, they stop immediately. Of course, handbrake wasn’t dressed, even the gear was not inside. I had the brakes all re-made (brake discs, brake pads and new protective plates for the brake discs) and there seems to be a connection here. r during the ride a noise, it sounds like a grinding of some part on the brake disc. I have to say that the vehicle stood about half a year. Before it came to a stop, I read the above mentioned parts swapped. At first I thought that by standing, rust had formed, and this would cause this “slip” noise. I know that from my restoration object, a Mercedes /8, which I often push back and forth, and which in doing so a similar I found a trace on the brake disc, someone said to me that it was “metal on metal”, so the brake disc seems to have been scratched. What could have caused it? Can brakes be “fixed”, which would also make the wheel stick? And: Someone told me that the brake disc is the scratch track (which, however, is at the extreme edge of the disc). t) can no longer be used and is considered a serious deficiency. Is that true? Thank you!