System Message 6906 in Microsoft Dynamics SL 2015 Content provided by Microsoft Applies to: Microsoft Dynamics SL 2015 Select Product Version All Products Symptoms You try to change the default report format in the Report Control Maintenance (98.300.00)screen and receive the following error message:System Message 6906- Another process has deleted the Format item. The system will automatically Cancel your changes. Cause The default report format cannot be changed by using the Report Control Maintenance (98.300.00) screen. Resolution Change the default report format by using the using the Defualt Report Format Maintenance (21.400.00) screen. Last Updated: 3 Feb 2017 Did this solve your problem? Yes No Tell us what we can do to improve the article Submit Thanks! Your feedback will help us improve the support experience.