phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b4c1964c44149e895cb0e5078992dc18' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('b4c1964c44149e895cb0e5078992dc18', -1, 1768545184, 1768545184, 'd849d82a', 2, 0)

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