Technical debt is the consequence of poor system design and architecture which can happen when they are done gradually in an adaptive environment. The Development Team should be careful with it and repay it with continuous refactoring.
Refactoring is improving the code without changing the external behavior. If the technical debt keeps increasing because the team doesn't refactor, development will become harder day after day and it will slow down the progress on
one hand and create problems for releases on the other hand.