Yes, Issues from one project can be chosen and moved to a different project. Here are the steps:
  1. On the Issue Tracker board, press the Bulk Actions button.
  2. Tick the check mark on the Issues you want to move. You can even select entire columns by ticking on the column.
  3. Once the Issue(s) are selected, press the Select Project drop-down, and choose the project you want to move the Issues to.
  4. Press the Apply bulk edit button to save changes.
change project issues 2