Since the Form 1099-K reports income from multiple properties, you can use your records to determine the income for each property and report all of the income as 'cash' under each property. Do not enter the Form 1099-K at all, but keep it with your tax records and be sure you can show which properties had income from the Form 1099-K and how much was included for each one.
The most important thing is that all of the income is reported in the right location of your return, not that the Form 1099-I itself was entered in the return. If you are contacted by the IRS, you will have your records ready to show where the total Form 1099-K was included as income.
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