File update from 2017 edition to 2020 edition

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Hello,

I updated three company files from 2017 to 2020.

Two files are updated.

However, one fie is not updated with error message.

It says,

"The program detected an error in your data when looking for information related record. You may want to restore your latest backup".

I restored backup, and, I did it again.

But, same situation.

How do I fix it?

Thanks,