And the incense that you shall make according to its composition, you shall not make for yourselves. It shall be for you holy to YHWH. Whoever makes any like it to use as perfume shall be cut off from his people.
Exodus 30:37-38

Just like the holy anointing oil, God forbids copying the incense intended for use in the Tabernacle/Temple. Incense symbolizes prayer. Is making illicit copies of God's incense analogous to misdirected, unrighteous, or self-aggrandizing prayers? See James 4:3.