phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6ddf309ee41af96a6292a5756b6af8a9' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('6ddf309ee41af96a6292a5756b6af8a9', -1, 1770032757, 1770032757, 'd849d837', 4, 0, 0)

Line : 187
File : sessions.php