Test Zephyr Migration from Jira Server to Jira Cloud

We are preparing to migrate from Jira Server to Jira Cloud and we are doing a test migration. I am testing migrating out Zephyr Squad from server to cloud and when I am using the Zephyr Migration tool it is asking for a Project Id. The issue is our project ids are alphanumeric and not just numeric when I put in our project ids it states that there is an error. Am I missing something?