End of support notice: On September 15, 2025, AWS will discontinue support for Amazon Lex V1. After September 15, 2025, you will no longer be able to access the Amazon Lex V1 console or Amazon Lex V1 resources. If you are using Amazon Lex V2, refer to the Amazon Lex V2 guide instead. .
During migration, Amazon Lex may find resources, such as built-in slot types, that it can't migrate to the equivalent Amazon Lex V2 resource. When this happens, Amazon Lex returns a migration message that describes what happened and provides a link to the documentation that tells you how to fix the migration issue. The following sections describe the issues that might arise when you are migrating a bot and how to fix the issue.
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