Avatarika
अतीतविद्याप्राप्त्युपसर्गप्रशमनार्था शान्ति पठिता ।इदानीं तु वक्ष्यमाणब्रह्मविद्याप्राप्त्युपसर्गोपशमनार्था शान्ति पठ्यते—
In plain words
The peace chant meant to remove obstacles concerning past studies has now been given. But now, another peace chant is recited, designed to clear away obstacles on the path to the knowledge of Brahman about to be taught.
Close to the Sanskrit
The peace invocation for subduing obstacles to the attainment of past knowledge has been recited. Now, however, the peace invocation for subduing obstacles to the attainment of the knowledge of Brahman about to be spoken is recited.