phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6a71e8fc30f7bac2b548c7a132fbd3d6' 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 ('6a71e8fc30f7bac2b548c7a132fbd3d6', -1, 1770499674, 1770499674, 'd849d876', 1, 0, 0)

Line : 187
File : sessions.php