I have installed Sitecore Commerce Server(ver. 11.3) and I need to migrate all data from the previous version of Commerce Server(it is 11.2). Just back up and restore doesn't work, I got following error message: "Application is not compatible with '11.200' version of 'Product Catalog' resource. Expected resource version is '11.300'"
Also, I tried to follow section "Breaking Changes" from this manual: http://commercesdn.sitecore.net/SCpbCS81/releasenotes/en-us/index.html , but it doesn't help, too.
What are the best practices of upgrading Sitecore Commerce Server? Any help will be appreciated.