What is the consequence of admitting evidence of a defendant's prior acts of domestic violence as propensity evidence?

We nonetheless conclude that the admission of the attempted suicide evidence was harmless error because it is not reasonably probable that a result more favorable to defendant would have been reached if such evidence had been excluded. (See Ogle, supra, 185 Cal.App.4th at p. 1145 [noting error in admitting evidence of a defendant's prior acts of domestic violence as propensity evidence under Evidence Code section 1109 is subject to the People v. Watson (1956) 46 Cal.2d 818, 836-837 (Watson) standard of prejudice].)