Do we need to use same publisher which gone to Live?

Hi

We used one publisher to phase 0 of our project and went live few months back. Now we base lined phase 0 managed solution as our new development and created unmanaged solution for phase 1 and created new Publisher for phase 1 which has same prefix and option set value.

New development environment

                       Phase 0 Managed solution

                       Phase 1 Unmanaged solution and new publisher with same prefix since we can't select phase 0 publisher due to managed.

 is it correct or do we need to use same publisher?. Does it matter if we use same prefix , only name is changed;

Could some one please answer the above.

Thanks