phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'f261cd9314b878d78a8f6c0ee0e543f1' 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 ('f261cd9314b878d78a8f6c0ee0e543f1', -1, 1769399836, 1769399836, 'd849d802', -9, 0, 0)

Line : 187
File : sessions.php