phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '879c7521dbde47a7a90f4cf202fe52b8' 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 ('879c7521dbde47a7a90f4cf202fe52b8', -1, 1793046994, 1793046994, 'd849d824', 2, 0, 0)

Line : 187
File : sessions.php