[SOLVED] Delete Wrong test project

Hello, i'm new user of projeqtor and i did many tests and trials for training, so i create projects, create ressources, affectations, activities etc... and now i want to delete my id#1 project to clean everything and i can't do it.
Software is displaying : Contrôles invalides / Impossible de supprimer un élément avec du travail réel
i've got admin rights, checked all habilitations etc...
somebody can help?

Hello and thank you Babynus.
i read it in the documentation, i put this question in the forum to be sure that Admin can or can't have the rights to do such delete operations in case of mistake. so i will move the project to close and he will not appear in the list;