Could not insert new anti bot question registration information

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b121ddf79559c0985057e3e0472bb7cb' for key 1

INSERT INTO phpbb_anti_bot_quest_regconfirm (confirm_id, session_id, start_time) VALUES ('4656555bc170226a8021448d82f73968', 'b121ddf79559c0985057e3e0472bb7cb', 1753976403)

Line : 121
File : usercp_register.php