Interesting fuel seep

I just finished an Annual on a nice 182T. On the second day there was a fuel seep on the trailing edge of the left wing where there was no evidence before. Finally figured out it was from me tightening the flap gap seal screws a little too tight causing the aft seam of the wet tank to open. My fix was a little bit of proseal and not tightening the screws as tight.

I have a fuel leak in October. Only time it leaks. Been that way 4 years