Streamer warning ( lol)

Code:

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C:\Users\John\Desktop\CnR\pawno\include\streamer.inc(338) : warning 201: redefinition of constant/macro (symbol "OnPlayerEnterCheckpoint")

C:\Users\John\Desktop\CnRr\pawno\include\streamer.inc(357) : warning 201: redefinition of constant/macro (symbol "OnPlayerLeaveCheckpoint")

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Why is this happening ? Lol