phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'dffc0bbd5fb545e0d7d2c062631e15fe' 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 ('dffc0bbd5fb545e0d7d2c062631e15fe', -1, 1775605910, 1775605910, '2e251811', -10, 0, 0)

Line : 187
File : sessions.php