Reinstall AVG on my MAC

Hello Leaf 
Thank you for contacting AVG Community Support.
We apologize for the inconvenience caused to you.
It is not recommended to install two antivirus programs on the same computer hence you get this issue.
If you want to install AVG please uninstall AVAST and proceed with installation so that you will not get any issues.
Thank you.

I am trying to reinstall Avast on my Mac.  But have some kind of fragments from the previous version as I get this message when installing Avast: AVG AntiVirus has been detected. To install the Avast product, please uninstall the incompatible software first.
What to do?
Thanks,
Leaf

Hello Leaf 
Thank you for contacting AVG Community Support.
We apologize for the inconvenience caused to you.
It is not recommended to install two antivirus programs on the same computer hence you get this issue.
If you want to install AVG please uninstall AVAST and proceed with installation so that you will not get any issues.
Thank you.