phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '397d514656ebe2936cac4b53a6a34f3a' 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 ('397d514656ebe2936cac4b53a6a34f3a', -1, 1766304998, 1766304998, 'd849d82e', -4, 0, 0)

Line : 187
File : sessions.php