Installing CUDA 10.2 in Ubuntu 16.04

I have some issue in installing the newest version CUDA 10.2 in Ubuntu 16.04 like below, can someone suggest me what to do. Because I cant find the package manager installation, which should be deleted.
Thanks in advance.

Existing package manager installation of the driver found. It is strongly │
│ recommended that you remove this before continuing. │
│ Abort │
│ Continue

Follow the instructions in section 2.7 of the linux install guide:

It’s recommended that you read the whole guide.