This feature is available in all editions.
In Digital.ai Agility, you can create Defects to plan and track fixes. Defects are part of the Backlog and are managed like other backlog items, just with different attributes. Just like stories/backlog items, you can assign size estimates to defects that factor into the team's velocity. You can then break them out into tasks and acceptance tests to allocate the work across multiple team members, or to more precisely identify the work required in a larger effort.