phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '779b20b6c56e4241f03c8ee5ea20077c' 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 ('779b20b6c56e4241f03c8ee5ea20077c', -1, 1763851878, 1763851878, 'd849d81e', -4, 0, 0)

Line : 187
File : sessions.php