Howdy fellow developers

I'm using URL params to flow information between client & server components
For example this URL : localhost:3000/contrats/1202028227?modif=service allows to display a modal specific to the service modification. This modal calls a server function.
If I refresh the page I get lofically the following error

Error: Server Functions cannot be called during initial render. This would create a fetch waterfall. Try to use a Server Component to pass data to Client Components instead.

I want to know how to manage this and redirect to localhost:3000/contrats/1202028227 if a user arrives directly on this URL / does a refresh as this will cause server function to be called at render.

I don't want to used proposed solution in the error since this would mean pre fetching the data through the server function even if the user never goes on the modal