Why was the timberwolves' pick in the NBA revoked a few years ago?

1999 Minnesota timberwolves engage in black-box operations _ _ In order to avoid paying luxury tax, joe smith, a former top scholar, agreed that if he was willing to sign a short-term contract with the timberwolves for one year or three years, he could get a long-term contract. Later, it was discovered by the Union that the Minnesota Timberwolves were revoked in 2000-200 1 and 2003-2004.