diff --git a/scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/repository/Compatibility.java b/scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/repository/Compatibility.java
index 69ba6e2904..bab090d25a 100644
--- a/scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/repository/Compatibility.java
+++ b/scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/repository/Compatibility.java
@@ -40,7 +40,8 @@ package sonia.scm.repository;
 public enum Compatibility
 {
   NONE(false, false, false, false, false),
-  PRE14(true, true, true, true, false), PRE15(false, true, true, true, false),
+  PRE14(true, true, true, true, false), 
+  PRE15(false, true, true, true, false),
   PRE16(false, false, true, true, false),
   PRE17(false, false, false, true, false),
   WITH17(false, false, false, false, true);
diff --git a/scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/repository/InstanceIDFix.java b/scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/repository/InstanceIDFix.java
new file mode 100644
index 0000000000..2463ba399c
--- /dev/null
+++ b/scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/repository/InstanceIDFix.java
@@ -0,0 +1,147 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer. 2. Redistributions in
+ * binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or other
+ * materials provided with the distribution. 3. Neither the name of SCM-Manager;
+ * nor the names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+package sonia.scm.repository;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Charsets;
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+import com.google.common.io.Files;
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Fixes Subversion repositories with db format 7, but without an instance id in the db/uuid file.
+ * 
+ * @see <a href="https://goo.gl/c3Ih89">910</a>
+ * @author Sebastian Sdorra
+ * @since 1.52
+ */
+public final class InstanceIDFix {
+  
+  private static final Logger LOG = LoggerFactory.getLogger(InstanceIDFix.class);
+  
+  private static final String PATH_DB = "db";
+  private static final String PATH_FORMAT = "format";
+  private static final String PATH_UUID = "uuid";
+  
+  private static final String DB_FORMAT = "7";
+  private static final Charset CHARSET = Charsets.US_ASCII;
+  private static final String LINE_SEPARATOR = System.getProperty("line.separator");
+  
+  private final File repository;
+  private final String dbFormat;
+  private final List<String> uuids;
+  
+  /**
+   * Creates a new instance to fix subversion repositories.
+   * 
+   * @param repository root directory of subversion repository
+   * 
+   * @throws IOException 
+   */
+  public InstanceIDFix(File repository) throws IOException {
+    this.repository = repository;
+    this.dbFormat = readDBFormat(repository);
+    this.uuids = readUUIDS(repository);
+  }
+  
+  /**
+   * Returns {@core true} if the repository format is 7 and the instance id is missing.
+   * 
+   * @return {@core true} if the repository must be fixed.
+   */
+  public boolean isRequired() {
+    return DB_FORMAT.equals(dbFormat) && uuids.size() == 1;
+  }
+
+  private String readDBFormat(File directory) throws IOException {
+    return Files.readFirstLine(dbFile(directory, PATH_FORMAT), CHARSET);
+  }
+  
+  private File dbFile(File directory, String filename) {
+    return new File(directory, PATH_DB + File.separator + filename);
+  }
+  
+  private List<String> readUUIDS(File directory) throws IOException {
+    return new ArrayList<>(Files.readLines(dbFile(directory, PATH_UUID), CHARSET));
+  }
+  
+  /**
+   * Add missing instance id to the uuid file of the repository and returns the generated instance id.
+   * 
+   * @throws IOException
+   * @return generated instance id
+   */
+  public String addInstanceID() throws IOException {
+    Preconditions.checkState(isRequired(), "repository has already an instance id and does not require the fix");
+    String uuid = uuids.get(0);
+    String instanceID = generateInstanceID();
+    addInstanceID(uuid, instanceID);
+    return instanceID;
+  }
+  
+  private void addInstanceID(String uuid, String instanceID) throws IOException {
+    LOG.info("created instance id {} for subversion repository {} format 7", instanceID, uuid);
+    String uuidFileContent = createUUIDFileContent(uuid, instanceID);
+    Files.write(uuidFileContent, dbFile(repository, PATH_UUID), CHARSET);
+    uuids.add(instanceID);
+  }
+  
+  private String generateInstanceID() {
+    return UUID.randomUUID().toString();
+  }
+  
+  private String createUUIDFileContent(String uuid, String instanceID) {
+    return new StringBuilder(uuid)
+            .append(LINE_SEPARATOR)
+            .append(instanceID)
+            .append(LINE_SEPARATOR)
+            .toString();
+    
+  }
+  
+  @VisibleForTesting
+  List<String> getUuids() {
+    return ImmutableList.copyOf(uuids);
+  }
+
+  @VisibleForTesting
+  File getRepository() {
+    return repository;
+  }
+}
diff --git a/scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/repository/SvnRepositoryHandler.java b/scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/repository/SvnRepositoryHandler.java
index e8357b565d..68f1ef99d5 100644
--- a/scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/repository/SvnRepositoryHandler.java
+++ b/scm-plugins/scm-svn-plugin/src/main/java/sonia/scm/repository/SvnRepositoryHandler.java
@@ -317,6 +317,8 @@ public class SvnRepositoryHandler
                      comp.isPre15Compatible(), comp.isPre16Compatible(),
                      comp.isPre17Compatible(), comp.isWith17Compatible());
 
+      fixMissingInstanceID(directory);
+      
       svnRepository = SVNRepositoryFactory.create(url);
 
       String uuid = svnRepository.getRepositoryUUID(true);
@@ -346,6 +348,14 @@ public class SvnRepositoryHandler
       SvnUtil.closeSession(svnRepository);
     }
   }
+  
+  private void fixMissingInstanceID(File directory) throws IOException {
+    InstanceIDFix fix = new InstanceIDFix(directory);
+    if (fix.isRequired()) {
+      fix.addInstanceID();
+    }
+  }
+
 
   /**
    * Method description
diff --git a/scm-plugins/scm-svn-plugin/src/test/java/sonia/scm/repository/InstanceIDFixTest.java b/scm-plugins/scm-svn-plugin/src/test/java/sonia/scm/repository/InstanceIDFixTest.java
new file mode 100644
index 0000000000..2cf5ae7f28
--- /dev/null
+++ b/scm-plugins/scm-svn-plugin/src/test/java/sonia/scm/repository/InstanceIDFixTest.java
@@ -0,0 +1,101 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of SCM-Manager; nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+package sonia.scm.repository;
+
+import java.io.File;
+import java.io.IOException;
+import org.junit.Test;
+import static org.junit.Assert.*;
+import org.junit.Rule;
+import org.junit.rules.TemporaryFolder;
+import org.junit.runner.RunWith;
+import org.mockito.runners.MockitoJUnitRunner;
+import org.tmatesoft.svn.core.SVNException;
+import org.tmatesoft.svn.core.io.SVNRepositoryFactory;
+
+/**
+ * Unit tests for {@link InstanceIDFix}.
+ * 
+ * @author Sebastian Sdorra
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class InstanceIDFixTest {
+
+  @Rule
+  public TemporaryFolder tempFolder = new TemporaryFolder();
+
+  @Test
+  public void testIsRequired() throws SVNException, IOException {
+    // svnkit uses db format 4 as default, so NONE must not be fixed
+    assertFalse(createFix(Compatibility.NONE).isRequired());
+
+    assertFalse(createFix(Compatibility.PRE14).isRequired());
+    assertFalse(createFix(Compatibility.PRE15).isRequired());
+    assertFalse(createFix(Compatibility.PRE16).isRequired());
+
+    // WITH17 creates db format 7, which is subversion >= 1.9 or not?
+    assertTrue(createFix(Compatibility.WITH17).isRequired());
+  }
+
+  @Test
+  public void testAddInstanceID() throws SVNException, IOException {
+    InstanceIDFix fix = createFix(Compatibility.WITH17);
+    assertTrue(fix.isRequired());
+
+    String instanceID = fix.addInstanceID();
+    assertFalse(fix.isRequired());
+
+    fix = new InstanceIDFix(fix.getRepository());
+    assertFalse(fix.isRequired());
+    assertTrue(fix.getUuids().contains(instanceID));
+  }
+  
+  @Test(expected = IllegalStateException.class)
+  public void testAddInstanceIDAllreadyFixedRepository() throws SVNException, IOException {
+    InstanceIDFix fix = createFix(Compatibility.WITH17);
+    assertTrue(fix.isRequired());
+
+    fix.addInstanceID();
+    fix.addInstanceID();
+  }
+
+  private InstanceIDFix createFix(Compatibility compatibility) throws SVNException, IOException {
+    return new InstanceIDFix(createRepository(compatibility));
+  }
+
+  private File createRepository(Compatibility compatibility) throws SVNException, IOException {
+    File directory = tempFolder.newFolder();
+    SVNRepositoryFactory.createLocalRepository(directory, null, true, false, compatibility.isPre14Compatible(),
+            compatibility.isPre15Compatible(), compatibility.isPre16Compatible(),
+            compatibility.isPre17Compatible(), compatibility.isWith17Compatible());
+    return directory;
+  }
+}
diff --git a/scm-plugins/scm-svn-plugin/src/test/java/sonia/scm/repository/SvnRepositoryHandlerTest.java b/scm-plugins/scm-svn-plugin/src/test/java/sonia/scm/repository/SvnRepositoryHandlerTest.java
index 5a46cdfd28..14f0e814fd 100644
--- a/scm-plugins/scm-svn-plugin/src/test/java/sonia/scm/repository/SvnRepositoryHandlerTest.java
+++ b/scm-plugins/scm-svn-plugin/src/test/java/sonia/scm/repository/SvnRepositoryHandlerTest.java
@@ -35,6 +35,8 @@ package sonia.scm.repository;
 
 //~--- non-JDK imports --------------------------------------------------------
 
+import com.google.common.base.Charsets;
+import com.google.common.io.Files;
 import sonia.scm.io.DefaultFileSystem;
 import sonia.scm.store.StoreFactory;
 
@@ -43,6 +45,9 @@ import static org.junit.Assert.*;
 //~--- JDK imports ------------------------------------------------------------
 
 import java.io.File;
+import java.io.IOException;
+import java.util.List;
+import org.junit.Test;
 
 /**
  *
@@ -66,7 +71,7 @@ public class SvnRepositoryHandlerTest extends SimpleRepositoryHandlerTestBase
     assertTrue(format.isFile());
 
     File db = new File(directory, "db");
-
+    
     assertTrue(db.exists());
     assertTrue(db.isDirectory());
   }
@@ -96,4 +101,18 @@ public class SvnRepositoryHandlerTest extends SimpleRepositoryHandlerTestBase
 
     return handler;
   }
+  
+  @Test
+  public void testCreatedUUID() throws RepositoryException, IOException {
+    SvnRepositoryHandler handler = (SvnRepositoryHandler) getHandler();
+    handler.getConfig().setCompatibility(Compatibility.WITH17);
+    
+    Repository repository = RepositoryTestData.createRestaurantAtTheEndOfTheUniverse();
+    handler.create(repository);
+    
+    File directory = handler.getDirectory(repository);
+    File uuidFile = new File(directory, "db" + File.separator + "uuid");
+    List<String> lines = Files.readLines(uuidFile, Charsets.UTF_8);
+    assertEquals(2, lines.size());
+  }
 }
diff --git a/scm-test/src/main/java/sonia/scm/repository/SimpleRepositoryHandlerTestBase.java b/scm-test/src/main/java/sonia/scm/repository/SimpleRepositoryHandlerTestBase.java
index 8799485b07..a3a8b90dd1 100644
--- a/scm-test/src/main/java/sonia/scm/repository/SimpleRepositoryHandlerTestBase.java
+++ b/scm-test/src/main/java/sonia/scm/repository/SimpleRepositoryHandlerTestBase.java
@@ -76,6 +76,11 @@ public abstract class SimpleRepositoryHandlerTestBase extends AbstractTestBase
   protected abstract RepositoryHandler createRepositoryHandler(
           StoreFactory factory, File directory);
 
+  
+  protected RepositoryHandler getHandler() {
+    return handler;
+  }
+  
   /**
    * Method description
    *
@@ -202,7 +207,7 @@ public abstract class SimpleRepositoryHandlerTestBase extends AbstractTestBase
 
   /** Field description */
   protected File baseDirectory;
-
+  
   /** Field description */
   private RepositoryHandler handler;
 }