phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4a9a6e854485a4cf77506a79739b69f0' 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 ('4a9a6e854485a4cf77506a79739b69f0', -1, 1769396197, 1769396197, 'd849d814', -4, 0, 0)

Line : 187
File : sessions.php