phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'd821f8bc8055b1dec845a9d8e8e15d8b' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('d821f8bc8055b1dec845a9d8e8e15d8b', -1, 1766099127, 1766099127, 'd849d8a2', -10, 0, 0)

Line : 187
File : sessions.php