Student starts a PhD at University A, the student is offered a project conceived by University A supervisor. Then student transfers to University B in agreement with University A supervisor that they will keep working on the project together. Student expands and develops the project and after 9 months at University B the external advisor at University A pulls out of the collaboration due to lack of time to properly supervise student. Student wants to keep working on the project independently given the time and money investment (salary from University B) and the interest for the topic but University A supervisor claims the ownership of the project. Student offers maximum flexibility to A supervisor to try to keep the supervisor involved in the project with little time commitment. Student has now developed a sense of ownership to the project.
How should the student handle the situation? Who owns the project? And what happens if the student keeps working on the project even if A supervisor has not given the green light?