phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c720326eca8c8c1dddf04b551fa082e4' 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, priv_session_id) VALUES ('c720326eca8c8c1dddf04b551fa082e4', -1, 1789687444, 1789687444, '6817c58d', 2, 0, 0, 'bffb6bd096f7314d7eb98150fa1c49d3')

Line : 188
File : sessions.php