New field will not show in the Datasource

Hello Experts,

I enhanced a datasource by adding a new field in the append structure and when I saved and activated and when into RSA5 or RSA6 then double clicked on the datasource my ZZ field does not show at the end. Anyone know why this is?

Datasource: 2LIS_11_VAITM

Extract Structure: MC11VA0ITM

Thanks!