Upgrade from CMS 10.10.4 to 11.20.3

After upgrading from cms 10.10.4 to 11.20.3, I am not able to upgrade episerver.forms.samples to 3.6.0 from 3.3.0.

The error which comes is as below:

Package 'EPiServer.Forms.Samples.3.6.0 : EPiServer.Forms [4.28.0, 5.0.0)' does not exist in project 'Aspect.Web'

But Episrevre.forms current version is 4.30.2.

Please suggest.