[Backport] Issue - #3185 Import user story with role points results in an IntegrityError
[Backport] Issue - #3185 Import user story with role points results in an IntegrityError

bdang2012/taiga-back-casting,Rademade/taiga-back,Rademade/taiga-back,taigaio/taiga-back,xdevelsistemas/taiga-back-community,bdang2012/taiga-back-casting,taigaio/taiga-back,xdevelsistemas/taiga-back-community,Rademade/taiga-back,gam-phon/taiga-back,dayatz/taiga-back,bdang2012/taiga-back-casting,dayatz/taiga-back,taigaio/taiga-back,gam-phon/taiga-back,gam-phon/taiga-back,dayatz/taiga-back,Rademade/taiga-back,bdang2012/taiga-back-casting,Rademade/taiga-back,gam-phon/taiga-back,xdevelsistemas/taiga-back-community