duplicate generation number for file groups. file group need to be recovered: aaaaaaaa

There is a file group that has the same generation number as the file group to be unloaded.
The corresponding file group may involve a write failure when it is assigned as a current file, so that the physical file's management information is invalid.

aaaaaaaa: File group name (identifier consisting of up to eight characters) that has the same generation number as the file group to be unloaded

O: When unloading without specifying a file group name, first use either of the following ways to recover the status of the file group indicated in this message

• Recover the jnlchgfg status of the file group.
• If the above operation fails, create another physical file consisting the file group.