ID:19012 Logic between pin "<name>" and its register contains a loop -- cannot implement Power-Up Level option

CAUSE: You turned on the Power-Up Level option for the I/O register of the specified pin. However, Analysis & Synthesis encountered a loop between the pin and the register, and is unable to implement the Power-Up Level option.

ACTION: Remove the looped logic in the design, or turn off the Power-Up Level option.