Throw Custom Validation on App Composer Before Update Trigger

Hi ,
I am writing a custom validation message on the app composer Before update trigger. The error message is successfully executed, however after the user clicks Ok to acknowledge , he is unable to navigate to any other tabs. On every click the error message is thrown again. Until the user has to cancel the transaction and again come back to the same page. Is there a workaround for this.

throw new oracle.jbo.ValidationException('Error Message.');

Thanks