phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ffadb8ccf1672051bf095019c3edf7e7' 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 ('ffadb8ccf1672051bf095019c3edf7e7', -1, 1769450074, 1769450074, 'd849d814', -4, 0, 0)

Line : 187
File : sessions.php