exported terraform configuration having ip_restriction_default_action and scm_ip_restriction_default_action with empty values

I'm exporting one of the existing linux based Azure Appservice and functionapp to terrafomr using aztfexport tool. But the generated terraform configuration is having

```
ip_restriction_default_action = ""
scm_ip_restriction_default_action = ""
```
I think these two properties are not mandatory and not adding default/actual values. The allowed values are "Allow or Deny". Hence when I execute `terraform plan` it's failing with

>
> Error: expected site_config.0.ip_restriction_default_action to be one of ["Allow" "Deny"], got
> │
> │ with azurerm_linux_web_app.res-1,
> │ on main.tf line 29, in resource "azurerm_linux_web_app" "res-1":
> │ 29: ip_restriction_default_action = ""

> Error: expected site_config.0.scm_ip_restriction_default_action to be one of ["Allow" "Deny"], got
> │
> │ with azurerm_linux_web_app.res-1,
> │ on main.tf line 30, in resource "azurerm_linux_web_app" "res-1":
> │ 30: scm_ip_restriction_default_action = ""

How to resolve/override this issue?