LT0E 2-steps pick error

Hi Experts

I met a problem during 2-steps pick. After I cerate a group via VL06P, I go to LT0E for the first picking. But when I enter the group number, system notice me the group number is not exist in table T311. then I check table T311, I found my record but there are two different group number. one of the group number is the number I created.

Please advice why system said the group number did not exist? And how can I solve it?

thanks a lot

Tony