Hello!
It seems that you try to download project to the plc or go online via PLCNext Engineer.
Probably the problem is in some predefined configuration of lan ports out from the box. And plc does not expect engineering connection to it’s dedicated profinet interface.
Try to connect your PG station to PLC via LAN1.
Also, as I know HW version should not occurs any FW interaction throubles.
But in your PLCNext engineer project FW version of plc have be <= online plc FW.
BR