phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c840cac36dc7929d20f90b5185e3d02c' for key 1

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('c840cac36dc7929d20f90b5185e3d02c', -1, 1715740589, 1715740589, '1276a518', -1, 0, 0)

Line : 187
File : sessions.php