phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'dd4fa0d53e704cce64ce8e78ca73bdd8' 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 ('dd4fa0d53e704cce64ce8e78ca73bdd8', -1, 1768215480, 1768215480, 'd849d887', 2, 0, 0)

Line : 187
File : sessions.php