Free Marker Template Null Pointer Error

Issue

Free marker template(ftl) error is occurring when fragments changes propagation is enabled.

Steps to Reproduce

Enable Automatic Page Fragment Propagation.
Navigate to Product Menu -> Design -> Fragments
Create a new Collection and new Fragment

Now, add below JSON snippet in Configuration Tab.

{
  "fieldSets": [
    {
      "label": "Spacing",
      "fields": [
     {
          "dataType": "string",
          "label": "Test Configuration",
          "name": "test",
          "type": "checkbox",
          "defaultValue": false
    }
      ]
    }
  ]
}

Under Tab HTML, add the below code snippet to use the configuration added:
```
${configuration.test?c}
```

Create a new Content Page, and add the newly created Fragment.
Publish the Page.

Now, update the Fragment, add a new configuration under Configuration Tab.

{
  "fieldSets": [
    {
      "label": "Spacing",
      "fields": [
     {
          "dataType": "string",
          "label": "Test Configuration",
          "name": "test",
          "type": "checkbox",
          "defaultValue": false
    },
     {
          "dataType": "string",
          "label": "Test Configuration",
          "name": "test1",
          "type": "checkbox",
          "defaultValue": false
    }
      ]
    }
  ]
}

Under Tab HTML, add the below code snippet to use the new configuration added.
```
${configuration.test?c}
${configuration.test1?c}
```
Publish the Fragment.
Fragment is not getting publish and it gives error "FreeMarker syntax is invalid. The following has evaluated to null or missing: ==> configuration.test1".

Environment

Liferay DXP 7.3

Resolution

The observed behavior is a known issue/bug and will be fixed in the upcoming fix pack.
If the hotfix is required for this issue, please create a support ticket requesting hotfix by attaching patch details.
Installing Fix Packs and Hotfixes on Liferay DXP will guide to install this hotfix in the respective environment.

Additional Information

LPS-132154