I´ve updated my board to be able to implement Sprints. When doing so, I found the tasks that were in the Board tab under the Backlog tab and was able to add them to a Sprint 0.
Now when trying to configure my Sprint1, the remaining tasks don´t appear in that Backlog tab to be able to add them to this new sprint.
Can someone help me? I´ve got a PI Planning session next week and need to solve this issue asap 
