FPGA-error: Can't place multiple pins assigned to pin location pin_30 (ioc_x0_y8_n0)

Multi-function Selection of pins involved in FPGA: some pins can be allocated as common I/O pins or programming pins. By default, these special pins are used as programming pins. If you want to use these pins as common I/O Ports, you must set them in the FPGA development tool, select an ordinary IO port. Otherwise, the following error occurs:

Error: Can't place multiple pins assigned to pin location pin_30 (ioc_x0_y8_n0)

The above error is due to the use of Pin 30 as a common IO port, and the development tool uses it as a programming pin, which will cause a conflict. Generally, when the function of programming pins needs to be used, these pins with special functions should be explicitly set as common Io ports.