To address the Legacy FamilySearch data problem marked by a red exclamation sign in your family tree, follow these steps for resolution. When identifying an issue, navigate to the ancestor's profile page where the problem is flagged. Locate the details tab and pinpoint the specific error concerning data format, date accuracy, event misplacement, or incorrect relationships. Click on the Edit button adjacent to the exclamation icon, which prompts a pop-up explaining the issue and seeking permission to apply corrections. If it's a standardization error, ensure the date, event, or place is corrected accurately. For non-standardization issues, input the correct information manually. Once changes are made, save the edits and refresh the page to confirm the correction. Before proceeding, verify changes meticulously to ensure accuracy and adherence to FamilySearch guidelines. This method not only resolves immediate data discrepancies but also ensures your family tree reflects precise ancestral information, mitigating future issues effectively.