Append Structure in DataSource

Hi Experts,

I drag the standard field from communication pool to communication structure of 2LIS_13_VDITM data source. But every time we drag any new field all the other ZZ fields automatically removed from the append structure. we have to add manually again all the ZZ fields in the append structure.

We are facing this problem from the very long time.

Is there any workaround to solve this?

Thanks,

Abhimanyu.