Is Business System Mandatory for IDOC_AAE

Hi All,

I am facing an issue .I am integrating two ECC systems to single PI using IDOC_AAE.

Unfortunately two ECC systems have same client,Sys ID, Logical System Name .So While Importing Business Systems in ID, only it is allowing one business system and It is not allowing to import other one as both business systems properties are same.

Is it possible to have scenario without Business System for IDOC_AAE. Can I go for Business Service?

Please help.

Reagrds,

Tibin