There were a few Argentine tango orchestras in 1930-40s that were tricked into signing a deal with record companies only, as it turned out, to prevent them from going to a competitor. As a result we don't have any records of these orchestras for the period of the contract, which may be like two years lacunas in their recorded history.

There is something deeply wrong with destroying things that haven't yet reached their natural end or not letting them grow, even if one is legally entitled to.