Engineering change orders (ECOs) are modifications to an implemented design. The Vivado Design Suite provides an ECO flow that lets you implement changes to an existing design checkpoint (DCP) and generate updated bitstream files. After implementing an ECO on the design, you might also need to modify, add, or delete debug cores or probes to the implemented design. Refer to this link in the Vivado Design Suite User Guide: Programming and Debugging (UG908) for information on the debug ECO flow.