diff --git a/data-model/src/main/java/org/alfresco/service/cmr/repository/RestoreInProgressException.java b/data-model/src/main/java/org/alfresco/service/cmr/repository/RestoreInProgressException.java
new file mode 100644
index 0000000000..2dbf75cda3
--- /dev/null
+++ b/data-model/src/main/java/org/alfresco/service/cmr/repository/RestoreInProgressException.java
@@ -0,0 +1,62 @@
+/*
+ * #%L
+ * Alfresco Data model classes
+ * %%
+ * Copyright (C) 2005 - 2021 Alfresco Software Limited
+ * %%
+ * This file is part of the Alfresco software. 
+ * If the software was purchased under a paid Alfresco license, the terms of 
+ * the paid license agreement will prevail.  Otherwise, the software is 
+ * provided under the following open source license terms:
+ * 
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ * #L%
+ */
+package org.alfresco.service.cmr.repository;
+
+import org.alfresco.api.AlfrescoPublicApi;
+import org.alfresco.error.AlfrescoRuntimeException;
+import org.alfresco.service.Experimental;
+
+/**
+ * Content Restoration in progress
+ * 
+ * @author David Edwards
+ */
+@AlfrescoPublicApi
+@Experimental
+public class RestoreInProgressException extends AlfrescoRuntimeException
+{
+    private static final long serialVersionUID = 5483215922384016269L;
+
+    public RestoreInProgressException(String msgId)
+    {
+        super(msgId);
+    }
+
+    public RestoreInProgressException(String msgId, Object[] msgParams)
+    {
+        super(msgId, msgParams);
+    }
+
+    public RestoreInProgressException(String msgId, Throwable cause)
+    {
+        super(msgId, cause);
+    }
+
+    public RestoreInProgressException(String msgId, Object[] msgParams, Throwable cause)
+    {
+        super(msgId, msgParams, cause);
+    }
+}
diff --git a/remote-api/src/main/java/org/alfresco/rest/framework/core/exceptions/RestoreInProgressException.java b/remote-api/src/main/java/org/alfresco/rest/framework/core/exceptions/RestoreInProgressException.java
new file mode 100644
index 0000000000..438421e415
--- /dev/null
+++ b/remote-api/src/main/java/org/alfresco/rest/framework/core/exceptions/RestoreInProgressException.java
@@ -0,0 +1,64 @@
+/*
+ * #%L
+ * Alfresco Remote API
+ * %%
+ * Copyright (C) 2005 - 2021 Alfresco Software Limited
+ * %%
+ * This file is part of the Alfresco software. 
+ * If the software was purchased under a paid Alfresco license, the terms of 
+ * the paid license agreement will prevail.  Otherwise, the software is 
+ * provided under the following open source license terms:
+ * 
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ * #L%
+ */
+package org.alfresco.rest.framework.core.exceptions;
+
+import org.alfresco.service.Experimental;
+
+@Experimental
+public class RestoreInProgressException extends  ApiException
+{
+    public static String DEFAULT_MESSAGE_ID = "framework.exception.RestoreInProgress";
+
+    public RestoreInProgressException() 
+    {
+        super(DEFAULT_MESSAGE_ID);
+    }
+
+    public RestoreInProgressException(String message) 
+    {
+        this(DEFAULT_MESSAGE_ID, message);
+    }
+
+    private RestoreInProgressException(String msgId, String message) 
+    {
+        super(msgId, message);
+    }
+
+    public RestoreInProgressException(Throwable cause) 
+    {
+        this(DEFAULT_MESSAGE_ID, cause.getLocalizedMessage(), cause);
+    }
+    
+    public RestoreInProgressException(String message, Throwable cause) 
+    {
+        this(DEFAULT_MESSAGE_ID, message, cause);
+    }
+    
+    private RestoreInProgressException(String msgId, String message, Throwable cause) 
+    {
+        super(msgId, message, cause);
+    }
+}
diff --git a/remote-api/src/main/resources/alfresco/public-rest-context.xml b/remote-api/src/main/resources/alfresco/public-rest-context.xml
index 24829a7856..8b5aeb23df 100644
--- a/remote-api/src/main/resources/alfresco/public-rest-context.xml
+++ b/remote-api/src/main/resources/alfresco/public-rest-context.xml
@@ -175,6 +175,7 @@
                 <entry key="org.alfresco.rest.framework.core.exceptions.ServiceUnavailableException" value="503" />
                 <entry key="org.alfresco.service.cmr.dictionary.InvalidTypeException" value="409" />
                 <entry key="org.alfresco.rest.framework.core.exceptions.ArchivedContentException" value="#{T(org.springframework.extensions.webscripts.Status).STATUS_PRECONDITION_FAILED}" />
+                <entry key="org.alfresco.rest.framework.core.exceptions.RestoreInProgressException" value="#{T(org.springframework.extensions.webscripts.Status).STATUS_CONFLICT}" />
             </map>
         </property>
     </bean>