phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '3437f6343271ad21f36681f9d5108704' 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 ('3437f6343271ad21f36681f9d5108704', -1, 1771768380, 1771768380, 'd849d890', 1, 0, 0)

Line : 187
File : sessions.php