Hi there, when i want to run my app locally the folloing error occured: “An error occurred while executing action 'Execute DDL commands'.” Here is the stack: An error occurred while executing action 'Execute DDL commands'. -------- com.mendix.m2ee.api.AdminException: Executing DDL commands failed. at com.mendix.basis.component.internal.LocalComponentImpl.executeDDLCommands(LocalComponentImpl.scala:115) Caused by: com.mendix.basis.connectionbus.ConnectionBusException: Error (SQL State: 42504, Error Code: -5504) on executing: ALTER TABLE "stl_verwaltungsapp$controlling_eingang_project_projektverwaltung" ADD CONSTRAINT "uniq_stl_verwaltungsapp$controlling_eingang_project_projektverwaltung_stl_verwaltungsapp$controlling_eingangid" UNIQUE ("stl_verwaltungsapp$controlling_eingangid") All changes are rolled back. at com.mendix.connectionbus.modelsynchronization.DdlCommandExecutor.execute(DdlCommandExecutor.java:79) Caused by: java.sql.SQLSyntaxErrorException: object name already exists: uniq_stl_verwaltungsapp$controlling_eingang_project_projektverwaltung_stl_verwaltungsapp$controlling_eingangid in statement [ALTER TABLE "stl_verwaltungsapp$controlling_eingang_project_projektverwaltung" ADD CONSTRAINT "uniq_stl_verwaltungsapp$controlling_eingang_project_projektverwaltung_stl_verwaltungsapp$controlling_eingangid" UNIQUE ("stl_verwaltungsapp$controlling_eingangid")] at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source) at org.hsqldb.jdbc.JDBCStatement.fetchResult(Unknown Source) at org.hsqldb.jdbc.JDBCStatement.execute(Unknown Source) at org.apache.commons.dbcp2.DelegatingStatement.execute(DelegatingStatement.java:291) at org.apache.commons.dbcp2.DelegatingStatement.execute(DelegatingStatement.java:291) at com.mendix.connectionbus.modelsynchronization.DdlCommandExecutor.executeDdlCommands(DdlCommandExecutor.java:136) at com.mendix.connectionbus.modelsynchronization.DdlCommandExecutor.execute(DdlCommandExecutor.java:43) at com.mendix.connectionbus.modelsynchronization.SynchronizationManager.synchronizeModel(SynchronizationManager.scala:170) at com.mendix.connectionbus.modelsynchronization.SynchronizationManager.executeImpl(SynchronizationManager.scala:161) at com.mendix.connectionbus.modelsynchronization.SynchronizationManager.execute(SynchronizationManager.scala:108) at com.mendix.connectionbus.ConnectionBusImpl.executeDDLCommands(ConnectionBusImpl.java:392) at com.mendix.basis.component.internal.LocalComponentImpl.executeDDLCommands(LocalComponentImpl.scala:107) at com.mendix.basis.impl.MxRuntimeImpl.executeDDLCommands(MxRuntimeImpl.java:1009) at com.mendix.basis.action.admin.ExecuteDDLCommandsAction.call(ExecuteDDLCommandsAction.java:26) at com.mendix.basis.action.admin.RuntimeAdminAction.execute(RuntimeAdminAction.java:18) at com.mendix.m2ee.appcontainer.server.handler.HttpAdminHandler.handle(HttpAdminHandler.java:129) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at org.eclipse.jetty.server.Server.handle(Server.java:502) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103) at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126) at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765) at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683) at java.lang.Thread.run(Thread.java:748) Caused by: org.hsqldb.HsqlException: object name already exists: uniq_stl_verwaltungsapp$controlling_eingang_project_projektverwaltung_stl_verwaltungsapp$controlling_eingangid at org.hsqldb.error.Error.error(Unknown Source) at org.hsqldb.error.Error.error(Unknown Source) at org.hsqldb.SchemaObjectSet.checkAdd(Unknown Source) at org.hsqldb.SchemaManager.checkSchemaObjectNotExists(Unknown Source) at org.hsqldb.TableWorks.addUniqueConstraint(Unknown Source) at org.hsqldb.StatementSchema.getResult(Unknown Source) at org.hsqldb.StatementSchema.execute(Unknown Source) at org.hsqldb.Session.executeCompiledStatement(Unknown Source) at org.hsqldb.Session.executeDirectStatement(Unknown Source) at org.hsqldb.Session.execute(Unknown Source) at org.hsqldb.jdbc.JDBCStatement.fetchResult(Unknown Source) at org.hsqldb.jdbc.JDBCStatement.execute(Unknown Source) at org.apache.commons.dbcp2.DelegatingStatement.execute(DelegatingStatement.java:291) at org.apache.commons.dbcp2.DelegatingStatement.execute(DelegatingStatement.java:291) at com.mendix.connectionbus.modelsynchronization.DdlCommandExecutor.executeDdlCommands(DdlCommandExecutor.java:136) at com.mendix.connectionbus.modelsynchronization.DdlCommandExecutor.execute(DdlCommandExecutor.java:43) at com.mendix.connectionbus.modelsynchronization.SynchronizationManager.synchronizeModel(SynchronizationManager.scala:170) at com.mendix.connectionbus.modelsynchronization.SynchronizationManager.executeImpl(SynchronizationManager.scala:161) at com.mendix.connectionbus.modelsynchronization.SynchronizationManager.execute(SynchronizationManager.scala:108) at com.mendix.connectionbus.ConnectionBusImpl.executeDDLCommands(ConnectionBusImpl.java:392) at com.mendix.basis.component.internal.LocalComponentImpl.executeDDLCommands(LocalComponentImpl.scala:107) at com.mendix.basis.impl.MxRuntimeImpl.executeDDLCommands(MxRuntimeImpl.java:1009) at com.mendix.basis.action.admin.ExecuteDDLCommandsAction.call(ExecuteDDLCommandsAction.java:26) at com.mendix.basis.action.admin.RuntimeAdminAction.execute(RuntimeAdminAction.java:18) at com.mendix.m2ee.appcontainer.server.handler.HttpAdminHandler.handle(HttpAdminHandler.java:129) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) at org.eclipse.jetty.server.Server.handle(Server.java:502) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103) at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126) at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765) at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683) at java.lang.Thread.run(Thread.java:748)