Query Suggestions Index - Data wiped

I created a query suggestions index using the “product index” as my source index and initially enabled Queries by facets on it. Later on I added some data manually in the suggestions index. Since the query suggestions index gets rebuilt everyday, I found out that all the manually added data got removed. How can I ensure that the manual data does not get removed from the query suggestions index ?

Manually added data was of the format

    "objectID" : "Apron",
    "query": "Apron",
    "popularity": 27