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I don't recommend changing your flare, though you do have the option of firing regular flares or blue flares, which will provide light and stick to the blocks they hit. They'll also deal minimal damage, and inflict the On Fire! debuff. Flares will travel in slight arcs and stick to blocks.
Are you trying to change so you have less than 3 flairs? Cause that might be where you're running into issues. Try doing it with the full three and see what happens.