Virtual Box machine throws following error?

Failed to open a session for the virtual machine Server3.

ahci#0: The target VM is missing a device on port 0. Please make sure the source and target VMs have compatible storage configurations [ver=9 pass=final] (VERR_SSM_LOAD_CONFIG_MISMATCH).

Result Code: E_FAIL (0x80004005) Component: ConsoleWrap Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}