GI Date is Blank in VL10B

Hello ,

We have created STO and get the "Delivery creation date " in Shipping data tab STO line item,

When i did VL10B to create Delivery, Why system show "GI Date " Blank

The GI Date is the date on which the goods must physically leave the shipping point to reach the customer on time.

2) Now : Light showing "Yellow" symbol, when it will show red? which might be the cases?

Thanks and Regards

sapman