In the Data Frames Properties dialog, select Grids, then select your graticule and click Properties. The last tab (Intervals) in Properties allows you to modify the interval for your parallels and meridians, as well as their origin. In your example your merdians are every 4°, probably the same for the parallels. The default origin is -90, which with 4° intervals places a parallel at 42°. Change -90 to 43 and your graticule parallel will be drawn at 43°. These options are not available in the wizard you use to create the graticule in the first place.
(If this isn't what you mean by "resolve the conflict", try to be more precise about what you're looking for.)