Notion database does not send name of linked page

Question

I am using Notion API to fetch data from Notio.

I am using

Notion-Version": "2022-06-28"

The code below is my request

 readUrl = f"https://api.notion.com/v1/databases/{self.db_id}/query"

 res = requests.request("POST", readUrl, headers=self.headers)
 self.data = res.json()

Even though I have names in Sprints and Tickets, they don't send names.

The data looks like as below

{
    id: 'Rv%5Cn',
    type: 'rollup',
    rollup: { type: 'array', array: [], function: 'show_original' }
  }

and ID is the same for all of them.

I tried one trick, created a new column, and used the CONCAT function, but this time they send data as below

{'id': 'rGlG', 'type': 'formula', 'formula': {'type': 'string', 'string': None}}

even though they have a name.

Response

"Sprint (contact)":{

   "id":"?`:a",

   "type":"formula",

   "formula":{

      "type":"string",

      "string":null

   }

},

"Sprint":{

   "id":"?}m;",

   "type":"rollup",

   "rollup":{

      "type":"array",

      "array":[

         

      ],

      "function":"show_original"

   }

}