If you filed a joint tax return, then it is unlikely that anything material would change by amending the return to correct the ownership of the K-1. That is why there does not appear to be any changes to the return when you corrected it.
Many income and deduction items on a joint tax return do not retain a particular person's ownership when they are reported on the return. It is doubtful that leaving the return as it was filed will cause any future issues. You are aware that it was incorrect and you have the documentation in hand in case it is ever questioned. Just keep it with your tax records.
For more information about when an amended return is required, take a look at the following TurboTax article:
Do I need to amend?
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