phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9c96cfd5e23313810323b9e2aee35a27' 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 ('9c96cfd5e23313810323b9e2aee35a27', -1, 1768019978, 1768019978, 'd849d805', 2, 0, 0)

Line : 187
File : sessions.php