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ERC error for power jack?

I can't get past this ERC error check:

"No SUPPLY for POWER pin CN1 GNDBREAK"

Researching for answers I found where they say to use the "INVOKE" command ; however that just leads to another error. "Part has only 1 gate: CN1"

Not sure what to do. Suppress the error by clicking "Approve" ? That kind of makes sense since it's an external power source, however I'm not too sure cause I don't quite understand this error.


Picture of ERC error for power jack?
Only1Gate.JPG