I don't understand why your Solution Manager searches for instance profiles of another system. If SAP is installed on a new system, it should not. If it does, it means that SAPINST discovered some sort of leftover from a previous installation and tries to find more information of that instance. The best course of action would be to use SAPINST to remove the old installation before starting the Solution Manager installation. There is a de-installation option in SAPINST main screen under Lifecycle Management that can be used to remove an SAP installation.
This was first published in February 2007