Fix Excel Power Pivot Data Model Refresh Error: Another CalculationProperty Object
Question details
The user is unable to refresh the Data Model in Power Pivot due to a CalculationProperty object conflict.
- Product
- Microsoft Excel
- Device & OS
- not provided
- Scenario
- Refreshing the Power Pivot Data Model after making modifications to source columns, calculated fields, measures, or the workbook's general structure.
- Observed behavior
- Excel displays the error message: "We couldn't refresh the Data Model from its source data. Another CalculationProperty object has the [ ] key."
Before modifying your Data Model or deleting measures, create a backup copy of your Excel workbook so you can safely revert if unintended changes occur.
Review and Remove Duplicate Calculations
Identify and eliminate any duplicate names or invalid references in your calculations that are triggering the CalculationProperty error.
This error typically arises when two or more items in the Data Model share the exact same internal reference key.
It is highly likely that a recent change—such as renaming a column header in the source data to match an existing measure—caused this conflict.
Navigate to the Power Pivot tab on the Excel ribbon and click on 'Manage' to open the Power Pivot window.
Review the calculated columns, measures, and source data headers that were modified immediately before the error appeared.
Check for any measures or calculated fields that have the same name as a newly imported source column.
Right-click the duplicate or invalid calculation and select 'Rename' to give it a unique name, or choose 'Delete' to remove it entirely.
Click 'Refresh' in the Power Pivot window to verify that the Data Model now updates successfully without the error.
Restore from a Previous Working Version
If the Data Model is severely corrupted and the duplicate key cannot be easily identified, reverting to a functional backup is the safest and fastest approach.
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Frequently Asked Questions
What does "Another CalculationProperty object has the key" mean in Excel?
This error means that Excel's Power Pivot Data Model has detected two or more calculations (such as measures or calculated columns) that share the exact same internal name or reference key, which creates a conflict when the system attempts to refresh the data.
Why did my Data Model refresh perfectly before, but fails now?
This issue is almost always triggered by a recent modification to the workbook. Common causes include importing a new source data column with the same name as an existing measure, duplicating a calculated field, or making structural changes to the tables.
Can I fix the Power Pivot Data Model without losing all my measures?
Yes. If you can pinpoint the specific duplicate measure or column that caused the conflict, you can simply rename or delete that individual item within the Power Pivot window. Once the conflict is resolved, the data model will refresh without losing your other measures.
