That's described in the DataMiner help:

https://docs.dataminer.services/user-guide/Advanced_Functionality/DataMiner_Agents/Configuring_a_DMA/Changing_the_DataMiner_ID.html
Since you're dealing with a new DataMiner installation with no data yet in it, I don't expect problems. Just be careful with DMAs that have already elements and such on them. Changing DMA ID might cause corruptions...