phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8fd21f581d3906139e9e4cf9c9c1ddaf' 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 ('8fd21f581d3906139e9e4cf9c9c1ddaf', -1, 1765780866, 1765780866, 'd849d868', 1, 0, 0)

Line : 187
File : sessions.php