phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4781f28f2b643bec1779bdb56a0fcd8c' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('4781f28f2b643bec1779bdb56a0fcd8c', -1, 1773596064, 1773596064, 'd849d86a', 0, 0)

Line : 152
File : /home/bsc/v1/phpbb2/includes/sessions.php