[Petronski]

Apparently God violated His own commandment when he gave instructions for construction of the Ark of the Covenant.

Or maybe your interpretation of Exodus 20:4 is defective.

Here’s a hint: Exodus 20:2-5 provides the complete context of Exodus 20:4.

[Fichori]

"Apparently God violated His own commandment" [excerpt]

And because God does something that God told man not to, makes it ok for man to do what man was told not to do?

God is not bound by the rules he has made for man.