Help with GFI

[Robm7299]

Hello,
I added a GFI outlet to the outside my garage. I used an outlet in the ceiling of the garage for power. It's always hot and not controlled by a switch. I used my meter and got 120 V at the ceiling outlet after adding 14-2 to the bottom of the existing outlet in the ceiling. I also got 120 v at the newly installed gif. The problem is the GFI trips.

It's not the breaker.
There's power going into the GFI.
I used PVC conduit.

Stumped

Any thoughts

 

[don_resqcapt19]

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