Impact of deleting catalog code groups and codes

Hi Guys,

We have a requirement of deleting catalog group and codes associated with it which we will do using QPCD table (QS41 tcode) ,but some business transactions(notifications and service orders) have already used these code groups .

Is there any impact of deleting the code groups on those transations.If yes kindly suggest ways to prevent possible impact.

Thanks and regards

Ritesh Kumar