What does Exodus 7:22 mean?

But the Egyptian magicians did something similar using their own tricks, so Pharaoh’s heart stayed hard. He didn’t listen to Moses and Aaron, just like God said he wouldn’t. Exodus 7:22 - Modern Text Bible

(Even though God’s sign was clear, Pharaoh’s magicians copy it, and Pharaoh refuses to change his mind, fulfilling God’s warning about his stubbornness.)