NEW YORK (AP) — The NBA wants its teams to avoid Twitter wars.

The reminder was issued in a memo from the league to all 30 teams on Tuesday. It comes about two weeks after Portland’s Twitter account mocked Dallas’ Chandler Parsons for airballing a 3-point attempt, a tweet that sparked a back-and-forth between Parsons and Blazers guard CJ McCollum.

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Parsons later said it was all in good fun.

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In the memo, NBA Deputy Commissioner Mark Tatum didn’t specifically reference that exchange but said “recently … some teams have crossed the line between appropriate and inappropriate.”

The league urged teams to “properly and extensively train” social-media staff members to ensure they know what’s appropriate. Examples the league cited as inappropriate included embarrassing or belittling opponents, and criticizing officiating.

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