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SQL Server error code

SQL Server error 7907

SQL Server raises error 7907 at severity 16, which marks a problem with the query or data that you can correct.

Table error: The directory "%.*ls" under the rowset directory ID %.*ls is not a valid FILESTREAM directory in container ID %d.
Msg7907
NameDBCC2_FS_INVALID_COLUMN_DIRECTORY
Severity16
Group7000–7999

What it means

The name of a column directory is the relational engine column ID of the partition. If a column directory name cannot be converted to a column ID, the directory is not a valid column directory.

Source: Database Engine events and errors