phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a1df98bf33cd0a6bb153c22ac791332e' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('a1df98bf33cd0a6bb153c22ac791332e', -1, 1770644348, 1770644348, 'd849d876', 1, 0, 0)

Line : 187
File : sessions.php