The property 'rule.0' does not exist in the model 'conf.service.snapraid.rule'

Error #0:
exception 'OMV\AssertException' with message 'The property 'rule.0' does not exist in the model 'conf.service.snapraid.rule'.' in /usr/share/php/openmediavault/config/configobject.inc:71
Stack trace:
#0 /usr/share/php/openmediavault/config/configobject.inc(186): OMV\Config\ConfigObject->assertExists('rule.0')
#1 /usr/share/php/openmediavault/config/configobject.inc(271): OMV\Config\ConfigObject->set('rule.0', '*.log', false)
#2 /usr/share/php/openmediavault/config/configobject.inc(233): OMV\Config\ConfigObject->setFlatAssoc(Array, false, false)
#3 /usr/share/php/openmediavault/config/database.inc(85): OMV\Config\ConfigObject->setAssoc(Array, false)
#4 /usr/share/php/openmediavault/config/database.inc(96): OMV\Config\Database->get('conf.service.sn...', NULL)
#5 /usr/share/openmediavault/engined/rpc/snapraid.inc(182): OMV\Config\Database->getAssoc('conf.service.sn...')
#6 [internal function]: OMVRpcServiceSnapRaid->getRuleList(Array, Array)
#7 /usr/share/php/openmediavault/rpc/serviceabstract.inc(124): call_user_func_array(Array, Array)
#8 /usr/share/php/openmediavault/rpc/rpc.inc(86): OMV\Rpc\ServiceAbstract->callMethod('getRuleList', Array, Array)
#9 /usr/sbin/omv-engined(536): OMV\Rpc\Rpc::call('SnapRaid', 'getRuleList', Array, Array, 1)
#10 {main}

root@NAS:~# omv-showkey snapraid
    <snapraid>
      <blocksize>256</blocksize>
      <autosave>0</autosave>
      <nohidden>0</nohidden>
      <syslog>1</syslog>
      <debug>0</debug>
      <sendmail>1</sendmail>
      <runscrub>1</runscrub>
      <scrubfreq>7</scrubfreq>
      <delthreshold>0</delthreshold>
      <drives>
        <drive>
          <uuid>ecb2ad8b-d039-496d-93f4-7213eff0ef0a</uuid>
          <mntentref>3d8bdc5e-24a9-4c97-92bd-e55c402c0e45</mntentref>
          <content>1</content>
          <data>0</data>
          <parity>1</parity>
          <name>Paritaet1</name>
          <label>Paritaet1</label>
          <path>/media/786d2cf2-9099-4ba0-9ed7-66e60e2f3c45</path>
        </drive>
        <drive>
          <uuid>31af1c03-400d-4fd6-8c0a-2030687ca0bb</uuid>
          <mntentref>a0128207-822c-4580-b901-1548db1fd0ef</mntentref>
          <content>1</content>
          <data>1</data>
          <parity>0</parity>
          <name>Daten1</name>
          <label>Daten1</label>
          <path>/media/987e22a7-7b91-4312-a45d-3ec2419f919c</path>
        </drive>
        <drive>
          <uuid>de8fc996-8956-43ac-8989-ef5421ae685d</uuid>
          <mntentref>1b54016f-7634-4c85-ad1a-65fd4eb1d2ed</mntentref>
          <content>1</content>
          <data>1</data>
          <parity>0</parity>
          <name>Daten2</name>
          <label>Daten2</label>
          <path>/media/dda4b038-f4df-4649-b1ed-5a99db0c133b</path>
        </drive>
        <drive>
          <uuid>590790c3-9050-4538-9d65-163197264c6d</uuid>
          <mntentref>fc0e0baa-b513-4276-a20e-5c4a17637738</mntentref>
          <content>1</content>
          <data>1</data>
          <parity>0</parity>
          <name>Daten3</name>
          <label>Daten3</label>
          <path>/media/c02d0ece-36bc-4c70-8aa9-170d842042f5</path>
        </drive>
        <drive>
          <uuid>1c4ff00d-5315-4ea1-b648-e23996f4385f</uuid>
          <mntentref>0e554b2e-ff62-4fa3-b098-cca634a46051</mntentref>
          <content>1</content>
          <data>1</data>
          <parity>0</parity>
          <name>Daten5</name>
          <label>Daten5</label>
          <path>/media/4a216144-5b34-4391-8a1d-77ca6ba710a0</path>
        </drive>
        <drive>
          <uuid>2fc51c4d-63e9-4564-b131-4250500a1cbe</uuid>
          <mntentref>5c80d936-ff75-4564-b626-9ef599019e24</mntentref>
          <content>1</content>
          <data>1</data>
          <parity>0</parity>
          <name>Daten6</name>
          <label>Daten6</label>
          <path>/media/4854797e-3d36-48be-93b9-e0e69c1619fb</path>
        </drive>
        <drive>
          <uuid>447b6b25-1420-49ff-86ca-03d2638f4108</uuid>
          <mntentref>401ac3dc-9f0e-4de2-9679-123288584493</mntentref>
          <content>1</content>
          <data>1</data>
          <parity>0</parity>
          <name>Daten4</name>
          <label>Daten4Neu</label>
          <path>/media/843bcdbb-5bb2-4e55-b4f4-053ea2e497fb</path>
        </drive>
      </drives>
      <rules>
        <rule>
          <uuid>edd20257-02bf-4ab2-88ff-3e99436da530</uuid>
          <mntentref>d2d7995c-08a4-4ea3-92c6-a11c9121b8c6</mntentref>
          <rule-folder>/media/36b05725-fab4-48b1-8bf6-56bdaa16c292</rule-folder>
          <rule>*.log</rule>
          <rtype>0</rtype>
        </rule>
        <rule>
          <uuid>83b12792-e652-448d-89dc-485b3c15c02c</uuid>
          <mntentref>d2d7995c-08a4-4ea3-92c6-a11c9121b8c6</mntentref>
          <rule-folder>/media/36b05725-fab4-48b1-8bf6-56bdaa16c292</rule-folder>
          <rule>/plexmediaserver/</rule>
          <rtype>0</rtype>
        </rule>
        <rule>
          <uuid>5fc2d736-0871-4667-b0c2-45e6ab04b706</uuid>
          <mntentref>d2d7995c-08a4-4ea3-92c6-a11c9121b8c6</mntentref>
          <rule-folder>/media/36b05725-fab4-48b1-8bf6-56bdaa16c292</rule-folder>
          <rule>/DockerApps/</rule>
          <rtype>0</rtype>
        </rule>
      </rules>
      <percentscrub>12</percentscrub>
      <scrubpercent>100</scrubpercent>
      <prehash>0</prehash>
    </snapraid>