Hi, I have experienced this issue in the past. For the import to work, the names of the fields need to be identical in both the sandbox and the production instance. However, there is a workaround that will allow you to migrate the program. I recommend that you make a copy of the program that you are trying to migrate (in Sandbox instance). In the copy you just created, remove all references to the field that caused the issue during the import. For example, if you are using this field in a Data Value Changed filter in a smart list, you can keep the filter in the smart list, but simply remove the field reference so that the attribute is empty. This process has to be done for all fields that have a different name in the production instance vs the sandbox instance. Once all references are removed, try to reimport the program and it should work. Once the program has finished importing, you will need to add the fields back to the program (in production) using the right fields in the production instance. Let me know if you have any questions.
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