Would you learn to speak English, please? One doesn't "set a precedence". How many times do I have to correct you, you fucking illiterate.
What to Know Precedence means “priority of importance,” as in “Their request takes precedence because we received it first.” Precedent means “an earlier occurrence” or “something done or said that may serve as an example.” Its plural precedents is pronounced just like precedence, so always check if you mean “priority” or “example” in your writing.