phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '48b9d51e0d9efea7e1ce2ac7b21d13b8' 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 ('48b9d51e0d9efea7e1ce2ac7b21d13b8', -1, 1769123159, 1769123159, 'd849d81d', -4, 0, 0)

Line : 187
File : sessions.php