For those who are using softaculous WordPress Installation script and they are facing this issue An installation already exists at as per our records. To re-install the application please uninstall the existing installation error inside softaculous.

You may also be interested in Email marketing service , fomo Plugins and Landing page tool

Precaution 

Before you delete any file please create a backup of your old file 

Solution 

To Fix  An Installation Already Exists At As Per Our Records issue you just need to click on

1.Over view and scroll down and click on delete

2. then select the all the 3 options .

a) database file

b) Files Manager

c) Delete installation file

3. Scroll down and click on Remove installation file