Material Change using idoc

Hi Experts,

Need your advise,

Actually my scenario is, that i am creating the Material using inbound idoc with Basic Type: MATMAS05 and Message Type: MATMAS,

now i need to change the same material, how can i achieve that??

Say, I have created a Material with MATNR: ABC using inbound MATMAS idoc, now how can i change it??

Aayush