Custom story error

[DERP HOOVY]

so i am making a custom story for amnesia. i made two maps and i notice the music stays the same as the music from the second map. so i make it so it plays specific music in a specific room, but when i added the code for that when i open the custom story the game crashes and says that it could not open the map and it said something about a function with the same name and parameters already exist. i've tried to fix it but nothing worked. please help!