Locate database files did not get out any .mdf file, even though there is an mdf file in the directory. This happened after I installed a new instance and wanted to attach a database to the instance. The only thing I observed though is that the CU versions of both instances are different. The first instance is 15.0.4033.1 and the new instance is on 15.0.2000.5. Please any idea on why this happend and what can I do to resolve it?
PS: The instances are on a production server. I have an option to install the latest CU but I am not if there wont be problems with the older running instance