I get this error after saving and reopening my rhythm heaven brsar

The wav has the exact same sample rate and amount of samples so I don't know what went wrong.
Although I did notice that rh's brsar is a different version than SSBB's so i don't know if that has anything to do with it not working or what.
It's the same stuff. ;_;
It might have to do with the rwav converter though, but idk.
I can send you the wave file I'm trying to replace it with, if you want to test it...
EDIT: When importing a sound, does the sample format have to be a certain thing? I never thought about changing it to something other than 32-bit float... I'll try that real quick.
EDIT2: I'm an idiot.... Wav files are already 16-bit PCM. orz