Hi.
I might be wrong but in the Terraform Basics Training Course it seems to me that there is an incorrect explanation.
Please check Terraform Basics Training Course Course | KodeKloud
Remote State > Terraform State Commands (lesson) minute 03:19 you should see an explanation where it looks like the instructor is renaming the resource using terraform state mv but afterwards he using the new name inside the table name property of the dynamo db resource as opposed to changing the dynamo db resource name to the new name. This can be very confusing. Maybe you should look it over to see if requires some adjustments
Thanks,
Vlad