phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '87574f9373ba4e27ffb5d0e3854f4161' 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 ('87574f9373ba4e27ffb5d0e3854f4161', -1, 1770004195, 1770004195, 'd849d8d8', 1, 0, 0)

Line : 187
File : sessions.php