How To Fix UPC307 - Fields (&1) that are not in the level, must remain initial

SAP Error Message - Details

• Message type: E = Error

• Message class: UPC - Planning: General Error Messages

• Message number: 307

• Message text: Fields (&1) that are not in the level, must remain initial

What causes this issue?

You have changed fields in a planning function, which are not contained
in the level. This leads to errors in further processing.

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?

Alter your function module.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.