Looks like because you did not use a second wrench to "back-up" the fitting you where trying to break free you ended up twisting the entire part an broke the steel line where it connects at the banjo fitting. There is a fitting which threads into the fuel pump and there is a banjo connection with its own nut which connects to that. You should have used a wrench on the fitting where it threads into the pump to hold it from turning then another wrench on the nut securing the banjo fitting to crack that nut free.

Now you need a replacement line, that about $30 last I saw. You will also need replacement crush washers for each side of all the banjo fittings in order to prevent leaks when you re-assemble everything. A small dab of grease on the electrical connections to each of the fuel pumps will be much appreciated by the next person to fool with them, also replace the rubber boots on the electrical connections if they are torn or damaged. When putting everything back together grease the screw which tensions the bracket holding the two pumps together, it’s small and Philip’s head so it’s easy for it to be a pain to remove if it gets any rust.

Get everything together loosely and in place and then give the fittings their final tightening torque that way there is no tension binding between the parts.