There was a need to change the entity name of the app being distributed on the distribution server, so I changed it while Snap-data was present and redistributed, but the following error occurred. M2EE : 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.executeDDLCommand(LocalComponentImpl.scala:113) Caused by: com.mendix.basis.connectionbus.ConnectionBusExceptioin: Error (SQL State:42000, Error Code: 942) on executing: ALTER TABLE "MODULE$TABLE" RENAME TO "MODULE$RE_TABLE" Successful changes were not rolled back. We advise you to restore the databases from a backup before trying to synchronize again. at com.mendix.connectionbus.modelsynchronization.DdlCommandExecutor.handleCommandExecutionException(DdlCommandExecutor.scala:142) Caused by: java.sql.SQLSyntaxErrorException: ORA-00942: table or view does not exitst... The above error occurred, and upon checking the DB of the server, the name of the table I wanted to change had already been changed. What causes errors like this, what measures can be taken now, and how to prevent them?