  The motion of Abrikosov vortices in type-II superconductors results in a
finite resistance in the presence of an applied electric current. Elimination
or reduction of the resistance via immobilization of vortices is the "holy
grail" of superconductivity research. Common wisdom dictates that an increase
in the magnetic field escalates the loss of energy since the number of vortices
increases. Here we show that this is no longer true if the magnetic field and
the current are applied parallel to each other.Our experimental studies on the
resistive behavior of a superconducting Mo$_{0.79}$Ge$_{0.21}$ nanostrip reveal
the emergence of a dissipative state with increasing magnetic field, followed
by a pronounced resistance drop, signifying a reentrance to the superconducting
state. Large-scale simulations of the 3D time-dependent Ginzburg-Landau model
indicate that the intermediate resistive state is due to an unwinding of
twisted vortices. When the magnetic field increases, this instability is
suppressed due to a better accommodation of the vortex lattice to the pinning
configuration. Our findings show that magnetic field and geometrical
confinement can suppress the dissipation induced by vortex motion and thus
radically improve the performance of superconducting materials.
