phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '0fdf6bfe39cc669c74dcd17018786bc8' 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 ('0fdf6bfe39cc669c74dcd17018786bc8', -1, 1776160810, 1776160810, 'd849d8a3', 1, 0, 0)

Line : 187
File : sessions.php