SEO - Sub Rate value is displaying as "Null" after importing a new rate without any sub rate value.

1] Login to the application on local environment using following URL:
https://wt-stage.harbinger.in
2] From Home page search and select a company for which testing needs to be carried out using "Search Company" section.
3] Click on "Ben Admin" menu.
4] Click on "Customizer" icon from left navigation menu.
5] Click on "Rates" link which is submenu of "Customizer", user gets navigate to "Rates" details page.
6] Click on "Import" button displaying at top right hand side of the "Rates" page, the "Rate Import" window gets poped up, click on “Add New Rate” tab.
7] Browse the file new rate file.
8] Click on "Upload" button.
9] Click on the "Import Rate" button.
10] Once rate get imported click on the newly added rate.
11] Navigate to Rate Metrics tab.
12] Observe the name for sub rate.

Actual Result:
Sub rate name is displaying as "Null".
Expected Result:
"No record Found" message should be display.
Refer attached screenshot for more details.