phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a05f84af10e91c44779f9e424046d79a' 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 ('a05f84af10e91c44779f9e424046d79a', -1, 1771015136, 1771015136, 'd849d88a', -4, 0, 0)

Line : 187
File : sessions.php