Checking Whether the Destination Database Contains a Non-Empty Collection with the Same Name As the Source Database

**Table 1** Checking whether the destination database contains a non-empty collection with the same name as the source database
Check Item	Whether the destination database contains a non-empty collection with the same name as the source database
Description	Check whether the source and destination databases have the same non-empty collections to prevent existing databases from being overwritten. If the source and destination databases have the same collections, the migration cannot be performed.
Failure Cause and Handling Suggestion	Failure cause: This item cannot be checked because the source database failed to be connected. Handling suggestion: Check whether the source database is connected.
	Failure cause: This item cannot be checked because the destination database failed to be connected. Handling suggestion: Check whether the destination database is connected.
	Failure cause: The same non-empty collections exist in both the source and destination databases. Handling suggestion: Determine whether to delete the same non-empty collections from the destination DB instance or specify a new destination DB instance.
	Failure cause: An internal error occurs. Handling suggestion: Contact Huawei technical support.