The serial number defined for the specified library does not match the serial number discovered. The pending operation will fail.
The library is taken offline when the mismatch is discovered. Verify the serial number and the device name for the library against those defined. If they do not match, the definitions for the library are incorrect and need updated. Once the serial number is updated, the library will be brought back online.
Update the serial number or device name for the specified library with the correct values.