duplicate net names wire PA1 - Altium designer
Have you checked the properties of your net labels? If they're supposed to connect to other sheets, you'll need to make sure the net label scope is set to "Global" to make sure all net labels AND all ports with the same name are connected together between sheets. You can change the properties of your net labels by going to Project --> Project Options --> Options tab and change the "Net Identifier Scope" dropdown to "Global". Then click OK.

Project --> Project Options:



"Options" Tab --> "Net Identifier Scope":



Change dropdown to "Global":