Fixed: IntegrityError: unique_together product code and product name
Fixed: IntegrityError: unique_together product code and product name

It is resolved by setting "code" : null in fixtures, instead of "code" : "NULL".
That's why we have disposed that code field is nullable.

OrlyMar/gasistafelice,feroda/gasistafelice,matteo88/gasistafelice,feroda/gasistafelice,OrlyMar/gasistafelice,michelesr/gasistafelice,michelesr/gasistafelice,matteo88/gasistafelice,befair/gasistafelice,feroda/gasistafelice,OrlyMar/gasistafelice,feroda/gasistafelice,michelesr/gasistafelice,kobe25/gasistafelice,kobe25/gasistafelice,OrlyMar/gasistafelice,befair/gasistafelice,befair/gasistafelice,michelesr/gasistafelice,kobe25/gasistafelice,matteo88/gasistafelice,kobe25/gasistafelice,matteo88/gasistafelice,befair/gasistafelice