**Table 1** Checking whether the destination database version is supported
Check Item	Whether the destination database version is supported
Description	Check whether the destination database version is MySQL 5.6.x, or MySQL 5.7.x.
Failure Cause and Handling Suggestion	Failure cause: The destination database version is not supported. Handling suggestion: Export data and then import it following the instructions provided in the "Migrating MySQL Data Using mysqldump" section in the Relational Database Service User Guide.
	Failure cause: Insufficient user permissions Handling suggestion: Check whether the database user permissions meet the migration requirements.
	Failure cause: An internal error occurs. Handling suggestion: Contact technical support.
	Failure cause: This item cannot be checked because the destination database fails to be connected. Handling suggestion: Check whether the destination database is connected.

**Table 2** Checking whether the destination database version is supported
Check Item	Whether the destination database version is supported
Description	Check whether the destination database version is MongoDB 3.4.x, 4.0.x, or 4.2.x.
Failure Cause and Handling Suggestion	Failure cause: The destination database version is not supported. Handling suggestion: Check whether the destination database version is MongoDB 3.4.x, 4.0.x, or 4.2.x.
	Failure cause: This item cannot be checked because the destination database fails to be connected. Handling suggestion: Check whether the destination database is connected.
	Failure cause: An internal error occurs. Handling suggestion: Contact technical support.

Checking Whether the Destination Database Version Is Supported