phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '177166f764161d256d78a768ef4caf39' 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 ('177166f764161d256d78a768ef4caf39', -1, 1776482117, 1776482117, 'd849d992', -4, 0, 0)

Line : 187
File : sessions.php