Bash: Converting Filename 0 - FILENAME.mkv to FILENAME.mkv?

I'm trying to convert a few files of the form 0 - FILENAME.mkv to FILENAME.mkv, but I'm doing something subtly wrong. This subroutine is in the .bashrc file in my home folder on my Manjaro OS computer. Whenever I update it, the shell it gets executed from does a source .bashrc to ensure that it is up to date.

However, the output is empty "", but runs properly when executed stand-alone in the shell.

What am I doing wrong?

Convert_Filenames_Remove_Leading_Number_Prefix() {
	ConversionTemporary="/run/media/sarah/MSS_EXtended/Conversion Temporary"
	TemporaryDir="/tmp/T1"
	mkdir "$ConversionTemporary"
	mkdir "$TemporaryDir"
	echo "Convert_Filenames_Remove_Leading_Number_Prefix()"
	echo "NOTES: Currently Works on .mp4, .mp3, opus, and .mkv files only. Converts: 0 - FILENAME.EXT -> FILENAME.EXT\n"

	#Copy to conversion temporary for safekeeping
	cp -a "`pwd`" "$ConversionTemporary"
	echo "Copying files to ConversionTemporary complete"
	
	#Main Sequence
	for i in *.{mkv,mp4,mp3,opus}; do 
		filaname=$(echo "$i" | cut -d "-" -f2 | awk '{$1=$1};1')
		echo "Result: $filename"
		mv -v "$i" "$filename"
	done
}

Using Perl's rename in one line:

rename 's/.*\s+//' ./*.{mkv,mp4,mp3,opus}