How To Fix UPF090 - Formula error: Type &1 is not permitted

SAP Error Message - Details

• Message type: E = Error

• Message class: UPF - Planning Functions

• Message number: 090

• Message text: Formula error: Type &1 is not permitted

What causes this issue?

Using the pushbutton 'data types', inform yourself about the permitted
types. With key figures, or attributes which are key figures, you use
the types I or F.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.