Enum memorized attribute failed at startup

[Pascal-Verdier]

Enum memorized attribute failed at startup with exception:

fr.esrf.Tango.DevFailed: Could not convert given object with class 'java.lang.String' to object with type signature 'class org.tango.testmemorized.TestMemorized$FillingEnum'
at org.tango.utils.DevFailedUtils.newDevFailed(DevFailedUtils.java:72) ~[JTangoCommons-9.2.7.jar:na]
at org.tango.server.attribute.AttributeImpl.getMemorizedValue(AttributeImpl.java:114) ~[JTangoServer-9.2.7.jar:na]
at org.tango.server.attribute.AttributeImpl.applyMemorizedValue(AttributeImpl.java:123) ~[JTangoServer-9.2.7.jar:na]
at org.tango.server.cache.PollingManager.initPolling(PollingManager.java:101) ~[JTangoServer-9.2.7.jar:na]
at org.tango.server.device.InitImpl.doInit(InitImpl.java:172) [JTangoServer-9.2.7.jar:na]
at org.tango.server.device.InitImpl.execute(InitImpl.java:126) [JTangoServer-9.2.7.jar:na]
at org.tango.server.servant.DeviceImpl.doInit(DeviceImpl.java:674) [JTangoServer-9.2.7.jar:na]
at org.tango.server.servant.DeviceImpl.initDevice(DeviceImpl.java:716) [JTangoServer-9.2.7.jar:na]
at org.tango.server.build.DeviceBuilder.createDevice(DeviceBuilder.java:126) [JTangoServer-9.2.7.jar:na]
at org.tango.server.build.DeviceClassBuilder.buildDevice(DeviceClassBuilder.java:76) [JTangoServer-9.2.7.jar:na]
at org.tango.server.export.TangoExporter.buildDevice(TangoExporter.java:228) [JTangoServer-9.2.7.jar:na]
at org.tango.server.export.TangoExporter.exportDevices(TangoExporter.java:118) [JTangoServer-9.2.7.jar:na]
at org.tango.server.export.TangoExporter.exportAll(TangoExporter.java:87) [JTangoServer-9.2.7.jar:na]
at org.tango.server.ServerManager.init(ServerManager.java:261) [JTangoServer-9.2.7.jar:na]
at org.tango.server.ServerManager.start(ServerManager.java:224) [JTangoServer-9.2.7.jar:na]
at org.tango.testmemorized.TestMemorized.main(TestMemorized.java:404) [classes/:na]