Unable to import Discount Rate.

I downloaded the template from Manage Lease Accounting Configuration, entered Manage Discount Rate sheet and uploaded it, but the discount rate was not registered.

The log is as attached, but the contents do not show the cause.

When uploading, an English environment is used.
Except for the Manage Discount Rate sheet, all other sheets are blank. (Sheets are not deleted, but left as they are.)

What is the cause?
Please let us know if you know the cause.

Thanks,

Mayuko