One station won't work unless other station comes on
I have 6 stations in my yard.
If I try to run one of my stations from the control box, it won't run unless I turn on another station.
When the second station turns off, the offending station continues to run without problems.
When I turn the station in question on at the valve, it turns on as it should.
All other stations are working properly.
Any ideas?
Thanks in advance.