Error on publish for content configured within unVersion.config

[DabinderSingh]

Hi unVersion Support Team

I get the following error when i publish content of the same type of doctype i have configured in the unVersion.config file.

Server error: Contact administrator, see log for full details.
The column aliases must be unique. [ Name of duplicate alias = Id ]

Also, the rollback options still display all previous versions, seems like unVersion has not deleted previous versions.

My steps were to install fresh Umbraco install via nuget, Umbraco v8.9.1 with starter pack & SQL CE.
Run initial startup of Umbraco site, login into Backoffice to make sure site is working as expected.
Install unVersion package from nuget
Add following config to unVersion.config

<?xml version="1.0"?>
<unVersionConfig>
  <add docTypeAlias="product" maxDays="1" maxCount="2" />
</unVersionConfig>

Restart Umbraco site, make a few saves to a product content item, click save and publish, I then get the following

This error now displays for all content of this type when publishing.

Initially i thought it was my test/dev site making use of Umbraco 8.6.4 & SQL CE and wasn't sure if it worked with SQL CE.
Did reach out to @skttl on slack and advised to raise issue