I cannot insert EXOSTIV IP because there is an existing instance with the same name in the target design

(This article applies to EXOSTIV for Xilinx, netlist flow.)

Depending on what you want to do next, you’ll have to either:
– Get back to the original design without EXOSTIV IP inserted.
– Keep the already inserted EXOSTIV IP and insert a new one – for this, you’ll need to save your instrumented design in Vivado and proceed again with core insertion and a fresh project. Please make sure to use a different IP instance name.