What is the name of the domain?
What is the issue you’re encountering
Delete old A records
What steps have you taken to resolve the issue?
I am asking first before I start editing settings
What are the steps to reproduce the issue?
I can understand easily the changing of the NS (name servers?) at my registrar. However adding new A records that is easy enough also. However, when I open up the DNS I see a lot of A records already there, what do I do with them, delete?, ignore?