Assignment block configuration in contract item

Hi experts,

The assignment block "configuration" for the product configuration (component: BTCONFIGURATION, viewname ConfigurationOV) doesn't appear in contract item in WebClient UI.

I checked the configuration of the overview in IUCONI (View IUCONI/OVViewSet), this assignment block is displayed.

Any idea why this block is hidden anyway in WebClient UI?

Thx for reply, Marie