phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '71d48531541e6dffde9e81cceffd3d17' 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 ('71d48531541e6dffde9e81cceffd3d17', -1, 1544666111, 1544666111, '36520adb', 10, 0, 0)

Line : 198
File : sessions.php