While importing a CRM Solution, it can happen that the following error appears as a “result” of the solution:
Found more than one RibbonDiff entity
This is a bug in CRM which duplicates the <RibbonDiff> tag in the customisations.xml file. To make it back to normal again,
- Open the customisations.xml file from your solution;
- Clear all the data from between the <RibbonDiff> and </RibbonDiff> tags;
- Import the solution again. The Ribbon should look like the default ribbon after a new installation of CRM.
- Import the original solution again;
- Publish All Customisations
Normally everything should be back to normal with a beautifull customized ribbon.