Portal 7.4 upgrade issue with Build component list for upgrade

Hi,

I am working with a NW7.4 Portal Upgrade and got stuck during the configuration step on phase BUILD_COMPONENT_LIST_FOR_UPGRADE (picture 1).

Normally I am stuck with some custom components, unable to proceed with the remove option. When I try to remove those components and continue with the deployment, it is again coming back to same stage with Rebuild the component list.

Need help here to proceed with removing these components for the upgrade, as we are planning to migrate these custom developed components post upgrade.

If there is no option for removing these objects and proceed for upgrade, then what should be ideal way to proceed for the upgrade.

Thanks,

Prasanna