NTP & DNS Not getting deleted when destroying using Terraform

I am seeking your advice on below issue:I am trying to configure DNS, NTP etc on f5 using terraform. I am observing that configuration is getting created when i do apply. But after doing destroy it is not getting deleted from the configuration even though output of “terraform destroy” shows that it is destroyed.BIG-IP Version:15.1.0.2

Terraform Version: v0.12.28

+ provider.bigip v1.2.1 (edited) 

#big-ip #devops #Automation #F5