phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a876c32bf10444b436793f0644396d77' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('a876c32bf10444b436793f0644396d77', -1, 1768089664, 1768089664, 'd849d83b', 17, 0)

Line : 180
File : /www/includes/sessions.php