The text "3795092A_Y111" is likely a JLCPCB order number which is used to track the board during manufacturing.

Ame-no-Torifune said in comment #2550648:

The text "3795092A_Y111" is likely a JLCPCB order number which is used to track the board during manufacturing.

Truly.
"3795092A" is the user ID, and "Y111" is the order number of this user.
JLCPCB usually charges an extra CN¥10 to remove the mark from your board