When you hotplug a Quad GbE PCIe Gen2 Adapter, you might see multiple errors. For example:
pcieport 0000:00:05.0: AER: Multiple Corrected error received: id=0028 pciehp 0000:00:05.0:pcie04: pciehp_power_off_slot: SLOTCTRL a8 write cmd 400 pcieport 0000:00:05.0: PCIe Bus Error: severity=Corrected, type= Physical Layer, id=0028(Receiver ID) pcieport 0000:00:05.0: device [8086:340c] error status/mask=00000001/00002000 pcieport 0000:00:05.0: [ 0] Receiver Error (First)
You can ignore these errors.