phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'dff5d9d0fe5d82e7776878797d259ea7' 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, priv_session_id) VALUES ('dff5d9d0fe5d82e7776878797d259ea7', -1, 1714327853, 1714327853, '6ca2d8f7', -4, 0, 0, '70fdce49c96bfe891844bd8d48b0882c')

Line : 187
File : sessions.php