I had been working on a project for my masters thesis under a doctoral student, which is eligible for a paper publication. But after finishing more than half of the project, my supervisor suddenly ordered me to start over a new project and told me to stop working on the former work, stating that a masters thesis work cannot be used in a doctoral student's dissertation even if I am given authorship in that paper.
I would sincerely like to know if what my supervisor said is true or if I am being cheated out of my masters project and thus my masters degree. Either way, can the answer please be supported by proper evidence(s) to support it? It will help me talk to my supervisor, if necessary with solid proof and even escalate it up the hierarchy if required.
I come from a Central University in India.