Can an apartment prohibit cannabis/weed if the lease allows smoking in a legal state?

Just as the title says. Our lease explicitly states we are allowed to smoke in the apartments (it does not specify only cigarettes or prohibit weed), however, our property manager sent out an email saying we can’t smoke weed in our apartments anymore, citing the fact it’s still illegal on the federal level. I don’t wanna reply to the email asking questions either because then I feel like it’s an admission of guilt lol.

Sorry if this has been asked before; I tried searching and I couldn’t find anything.

Edit: thank you for all the comments and suggestions!