How long does it seep out?
If it's constantly 24/7 seeping that you have a stuck valve and that valve would need to be replaced
If it's only for a short amount of time - Sprinkler systems are a gravity based system, so water will leak out generally out of the last head on the zone until it reaches atmospheric pressure.
You can install a SAM Sprinkler head to help prevent the sprinkler head from leaking after the zone shuts off
This is a
Pop up spray SAM
This is a
Rotor SAM