phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '840ccb6ca2436efd8f1c839c6d7809b1' 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 ('840ccb6ca2436efd8f1c839c6d7809b1', -1, 1731880571, 1731880571, '0aff0001', 126, 0, 0)

Line : 199
File : sessions.php