He told Billboard magazine: "It was a moral thing.
"Taking a stem or a vocal is not something that would ever happen on my watch. It now can't happen on anyone else's."
The news comes almost four years after the compilation album Lioness: Hidden Treasures was released in 2011, which featured unreleased songs and demos recorded before her death in July of the same year.
The record label boss has also recently been involved in the documentary film Amy as an executive producer, and explained while promoting the production why he believes the Valerie singer never achieved the same amount of success in the US as she did in the UK.
He explained: "She never spent enough time [in the United States] for people to get a sense of her outside of being drunk and sloppy.
"Some asked, 'Are you making a film about a drug addict?' People didn't even realise she wrote her own lyrics."
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