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Could not import worldCities.csv file

Application ID: F698C529-1FF3-871A-FF6D-52A0154D3600
Error UID: 68457173-5776-57D0-FFE3-C1293372F000

Backendless encountered an error while handling the request. An internal trouble ticket with ID 68457173-5776-57D0-FFE3-C1293372F000 has been created and we will be investigating the issue.
DataSchemaModificationLocker: the lock for key F698C529-1FF3-871A-FF6D-52A0154D3600::SCHEMA_MODIFICATION_LOCK was already released.
java.lang.IllegalStateException: DataSchemaModificationLocker: the lock for key F698C529-1FF3-871A-FF6D-52A0154D3600::SCHEMA_MODIFICATION_LOCK was already released.
	at com.backendless.management.DataSchemaModificationLocker.releaseLock(DataSchemaModificationLocker.java:101)
	at controllers.console.migration.Import.lambda$importZip$4(Import.java:189)
	at com.backendless.async.ExecutorService.lambda$submit$0(ExecutorService.java:64)
	at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1700)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)

Problem description

Describe what you did in console that led to the error. Please provide a description of what actually happens. Be descriptive: “it doesn’t work” does not describe what the behavior actually is. This will help us with reproducing the problem.

Steps to reproduce

Please describe steps to reproduce starting from the first action.

Hello @1120

As I understand you were trying to import something, could you please attach the archive or csv file that you are trying to import? Then we will able to reproduce the issue and fix it.