The New York Knicks signed wing RJ Barrett to a 4-year, $120 million contract on Monday. Since the deal is a rookie extension, it includes a poison pill provision. From the ESPN article:
For trade purposes, the poison pill is computed with a formula that would put the Knicks’ outgoing salary for a Barrett trade at $10.9 million but require the incoming salary for a team acquiring him to be $26.2 million. The restriction will be lifted next offseason July 1.
Essentially it makes it very difficult to match salaries in the trade, as the Jazz would be acquiring a much higher salary than the Knicks would be sending out.