Plaintiff 1 and Plaintiff 2 were injured in a car accident caused by Defendant, who ran a red light. After initiating the case, Plaintiff 1 received a favorable settlement from Defendant. Defendant called Plaintiff 1 as a witness in the case brought by Plaintiff 2. Plaintiff 1 testifies, "Defendant did not run the red light." May Plaintiff 2's lawyer ask Plaintiff 1 about the favorable settlement?

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