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Thank you for the answer. This worked!
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I created a Form in InfoPath 2013 and published this form to a SharePoint library in Office 365. The form worked great for the first few submits, but we decided to change, or modify the existing fields and here is where we found an issue:<br />
<br />
We updated the form with the new/updated fields and after we published again I noticed the new published form cleared the data in existing forms that were submitted before the changes/updates to the form, luckily we capture some of the fields on the SharePoint list and we had that info, but the previous forms have some fields that are empty now. <br />
<br />
My question is - If I modify this form, or add more fields, it will clear my existing data? Is there a setting in the SharePoint list, or form that will prevent existing data in the forms from being replaced, or cleared? <br />
<br />
Thank you much in advance for any advice!<br />
<br />
Mario G.
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I created a Form in InfoPath 2013 and published this form to a SharePoint library in Office 365. The form worked great for the first few submits, but we decided to change, or modify the existing fields and here is where we found an issue:

We updated the form with the new/updated fields and after we published again I noticed the new published form cleared the data in existing forms that were submitted before the changes/updates to the form, luckily we capture some of the fields on the SharePoint list and we had that info, but the previous forms have some fields that are empty now. 

My question is - If I modify this form, or add more fields, it will clear my existing data? Is there a setting in the SharePoint list, or form that will prevent existing data in the forms from being replaced, or cleared? 

Thank you much in advance for any advice!

Mario G.

InfoPath clearing existing information in saved forms in SharePoint list

Microsoft InfoPath is a software application for designing, distributing, filling and submitting electronic forms containing structured data. The product features a WYSIWYG form designer in which the various controls (e.g. textbox, radio button, checkbox) are bound to data, represented separately as a hierarchical tree view of folders and data fields. All the data stored in InfoPath forms are stored in an XML format. Secondary data sources can be built into the form or they can be accessed through an external data connection to SharePoint or a Web service.

InfoPath

Microsoft Sharepoint is a software platform and family of software products used for collaboration and web publishing combined. These capabilities include developing web sites, portals, intranets, content management systems, search engines, wikis, blogs, and other tools for business intelligence and collaboration. SharePoint has a Microsoft Office-like interface, and it is closely integrated with the Office suite.

Microsoft SharePoint

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.