https://musicbrainz.org/edit/75966437 doesn't look right to me.

https://musicbrainz.org/doc/Style/Release#Barcode doesn't currently say that's wrong.

e.g.,

> Only one barcode should be stored in this field; do not attempt to concatenate multiple barcodes together, as such a string would not be machine-readable data since the length of each barcode in the string is unknowable.