Hi ,
As said byall above you can go for a change from ECC end but if u want not to disturb ECC end objects then u can try for PSEUDO delta logic at infopackage level if u have any DATE field availble in ur data flow.
Which pushes only newly created entrys based on DATE else,u can do a delete and re-load every time u load.Mover over u r doin an FULL load every time so based on the data volume u can decide for delete nd reload option.
Thanks,
Rohith