Historical Rules · 8 September 2022
Rule 301.5e
Official source text from the 8 September 2022 Rules release
If an effect attempts to put an Equipment that isn’t also an Aura (see rule 303.4i) onto the battlefield attached to an object it can’t legally equip, the Equipment enters the battlefield unattached. If the Equipment is a token, it’s created and enters the battlefield unattached.