During the upgrade of your Tealeaf databases, you might receive an error similar to the following:
Invalid filegroup <name> specified.The error indicates that the database file <name> is missing. To fix this issue, you must determine if the database that contains the file is supposed to contain a single filegroup or not.
Note: All Tealeaf databases should contain only multiple filegroups.
A missing filegroup indicates database corruption and might require rebuilding the database or restoring from backup.