Don't mix keys in TasksPlanner
Don't mix keys in TasksPlanner

It should be a very rare bug, but if a task has an id equal to 2 or 3, a
strange behaviour can happen where the task appears in the placeholder
slot when unplanning it.

marienfressinaud/project-zero,marienfressinaud/lessy,marienfressinaud/project-zero,marienfressinaud/lessy,marienfressinaud/project-zero,marienfressinaud/lessy