case madmin.AdminAPIVersion:
			desc = fmt.Sprintf("This 'admin' API is not supported by server in '%s'", getMinioMode())
		default:
			desc = fmt.Sprintf("Unexpected client 'admin' API version found '%s', expected '%s', please downgrade the client to older releases", version, madmin.AdminAPIVersion)
		}
		writeErrorResponseJSON(r.Context(), w, APIError{
			Code:           "XMinioAdminVersionMismatch",
			Description:    desc,

    /**
     * Enforce secure negotiation
     *
     * Property {@code jcifs.smb.client.requireSecureNegotiate} (boolean, default true)
     *
     * This does not provide any actual downgrade protection if SMB1 is allowed.
     *
     * It will also break connections with SMB2 servers that do not properly sign error responses.
     *
     * @return whether to enforce the use of secure negotiation.
     */

				if !ok {
					ckvs.Set(kv.Key, kv.Value)
				}
			}
			if _, ok := cp[subSys]; !ok {
				rnSubSys, ok := renamedSubsys[subSys]
				if !ok {
					// A config subsystem was removed or server was downgraded.
					continue
				}
				// Copy over settings from previous sub-system
				// to newly renamed sub-system
				for _, kv := range cp[rnSubSys][Default] {
					_, ok := c[subSys][tgt].Lookup(kv.Key)

            }
        } catch (final UnknownHostException uhe) {}

        w = new WriterThread();
        w.setDaemon(true);
        w.start();

        /* Downgrade one transport to the lower of the negotiated buffer sizes
         * so we can just send whatever is received.
         */

        final SmbTransport t1 = tree.session.transport;

          <name>preserveModelVersion</name>
          <version>4.1.0+</version>
          <description>
            Indicates if the build POM for this project should be preserved or downgraded to the lowest
            compatible version.
            @since Maven 4.0.0
          </description>
          <type>boolean</type>
          <defaultValue>false</defaultValue>
        </field>

- Support a smooth upgrade from client-side apply to server-side apply without conflicts, as well as support the corresponding downgrade. ([#90187](https://github.com/kubernetes/kubernetes/pull/90187), [@julianvmodesto](https://github.com/julianvmodesto)) [SIG API Machinery and Testing]

    `CUDA_ERROR_ILLEGAL_ADDRESS` failures.

    A fix in CUDA 9.1.121 is expected in late February 2018. We do not expect a
    fix for CUDA 9.0.x. Until the fix is available, the only workaround is to
    [downgrade](https://developer.nvidia.com/cuda-toolkit-archive) to CUDA 8.0.x
    or disable XLA:GPU.

    TensorFlow will print a warning if you use XLA:GPU with a known-bad version

- DRA: The scheduler plugin prevented abnormal filter runtimes by timing out after 10...

- fluentd-elasticsearch is unchanged from 1.10: v2.0.4 ([#58525](https://github.com/kubernetes/kubernetes/pull/58525))
- The fluent-plugin-kubernetes_metadata_filter plugin in fluentd-elasticsearch has been downgraded to version 2.0.0 ([#67544](https://github.com/kubernetes/kubernetes/pull/67544))
- fluentd-gcp is unchanged from 1.10: v3.0.0. ([#60722](https://github.com/kubernetes/kubernetes/pull/60722))

    * To downgrade the cluster to version that does not support scale-to-zero feature:
    * 1. make sure there are no hpa objects with minReplicas=0. Here is a oneliner to update it to 1: