Atmire MQM migration error log

dspace.log

2016-06-16 23:07:04,427 ERROR org.flywaydb.core.internal.command.DbMigrate @ Migration of schema "public" to version 5.1.2015.12.03.3 failed! Changes successfully rolled back.
2016-06-16 23:07:04,431 ERROR org.dspace.storage.rdbms.DatabaseManager @ SQL getDataSource Error - 
java.sql.SQLException: Flyway migration error occurred
	at org.dspace.storage.rdbms.DatabaseUtils.updateDatabase(DatabaseUtils.java:389)
	at org.dspace.storage.rdbms.DatabaseUtils.updateDatabase(DatabaseUtils.java:309)
	at org.dspace.storage.rdbms.DatabaseManager.initialize(DatabaseManager.java:1371)
	at org.dspace.storage.rdbms.DatabaseManager.getDataSource(DatabaseManager.java:648)
	at org.dspace.storage.rdbms.DatabaseManager.getConnection(DatabaseManager.java:627)
	at org.dspace.core.Context.init(Context.java:121)
	at org.dspace.core.Context.<init>(Context.java:95)
	at org.dspace.rest.Resource.createContext(Resource.java:73)
	at org.dspace.rest.ItemsResource.getItems(ItemsResource.java:165)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
	at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
	at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
	at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)
	at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
	at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1511)
	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1442)
	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1391)
	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1381)
	at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538)
	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)
Caused by: org.flywaydb.core.api.FlywayException: Migration failed !
	at org.flywaydb.core.internal.resolver.jdbc.JdbcMigrationExecutor.execute(JdbcMigrationExecutor.java:47)
	at org.flywaydb.core.internal.command.DbMigrate$5.doInTransaction(DbMigrate.java:287)
	at org.flywaydb.core.internal.command.DbMigrate$5.doInTransaction(DbMigrate.java:285)
	at org.flywaydb.core.internal.util.jdbc.TransactionTemplate.execute(TransactionTemplate.java:72)
	at org.flywaydb.core.internal.command.DbMigrate.applyMigration(DbMigrate.java:285)
	at org.flywaydb.core.internal.command.DbMigrate.access$800(DbMigrate.java:46)
	at org.flywaydb.core.internal.command.DbMigrate$2.doInTransaction(DbMigrate.java:207)
	at org.flywaydb.core.internal.command.DbMigrate$2.doInTransaction(DbMigrate.java:156)
	at org.flywaydb.core.internal.util.jdbc.TransactionTemplate.execute(TransactionTemplate.java:72)
	at org.flywaydb.core.internal.command.DbMigrate.migrate(DbMigrate.java:156)
	at org.flywaydb.core.Flyway$1.execute(Flyway.java:864)
	at org.flywaydb.core.Flyway$1.execute(Flyway.java:811)
	at org.flywaydb.core.Flyway.execute(Flyway.java:1171)
	at org.flywaydb.core.Flyway.migrate(Flyway.java:811)
	at org.dspace.storage.rdbms.DatabaseUtils.updateDatabase(DatabaseUtils.java:381)
	... 47 more
Caused by: org.dspace.content.NonUniqueMetadataException: Please make the namespace  unique
	at org.dspace.content.MetadataSchema.create(MetadataSchema.java:228)
	at com.atmire.dspace.database.FieldDatabaseLoader.loadDatabaseChanges(FieldDatabaseLoader.java:60)
	at org.flywaydb.core.api.migration.atmire.AtmireFlywayMigration.migrate(AtmireFlywayMigration.java:29)
	at org.flywaydb.core.internal.resolver.jdbc.JdbcMigrationExecutor.execute(JdbcMigrationExecutor.java:45)
	... 61 more