Thats something called "stipules". Nothing to worry about.
They gonna dry and dont do anything.
"Stipules appear at the nodes, usually in pairs, but they can also grow singly. They look like tiny, thin leaves or daggers and can often be mistaken for pistils and signs of pre-blooming.
The exact role of stipules in cannabis is unknown, although some botanists believe their role is to protect young, newly formed leaves. In other plants, the stipules typically grow into thorns."
source:
https://sensiseeds.com/en/blog/the-parts-of-the-cannabis-plant/
Bless!