How to update task start date when project start date changes?

How to update task start date when project start date changes?

Hi there,

When the start date of a project changes, it's important to update the start dates of the tasks associated with that project to reflect the new timeline. 

Is there a way to shift the start date of all project tasks when the start date of a project changes.  

Ive been trying to create a custom function for this but without any success.
Tried to do this with a Zoho Flow but fetching task lists and task in flow is not really workable solution. 

Any help will be very much appreciated.