Hi Darshan Hiranandani, welcome to the community!
Unfortunatelly, this is one of many instances where data that is meant to remain hidden can be easily accessed by unsuspecting users.
In this thread you can read about some other users asking for similar changes and we hope Coda will address them in the next months: Beta opportunity: New in-doc search - News from Coda - Coda Maker Community
For your specific case, Darshan Hiranandani, I would suggest that in the pages that are meant to be public you hide the column referencing the item and create an additional column that references just the name of the item.
Hope this helps you, Darshan Hiranandani, don’t hesitate to write if you have follow up questions.
Pablo