SMSY define ERP system with Process Integration instance

Hello,

We have connected new installed ERP system (ERP 6.0 EHP3) to central SLD (SAP SM EHP1).

But we can see the strange situation.

SMSY define automatically this ERP system as the system with Process Integration instance but not ECC Server instance.

We have not installed Usage Type PI in the ERP system.

Also we have old ERP system in SLD. It is visible as SAP ERP system with ECC Server instance.

What is the strange behaviour of SMSY? What should we do and how can we correct this definition in SMSY?