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

UPC307 - Overview

• 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.

UPC307 - Details

• The SAP error message UPC307 indicates that certain fields specified in the message (represented by &1) are not part of the current level in a hierarchical structure, and as a result, they must remain uninitialized (i.e., empty or blank). This error typically occurs in the context of SAP's Universal Planning or similar applications where data is structured in levels, such as in planning scenarios.
  
  Cause:
  
  Hierarchical Structure: The error arises when you attempt to assign values to fields that are not defined at the current level of the hierarchy. For example, if you are working with a planning hierarchy and trying to input data at a higher level, but the fields you are trying to populate are only valid at a lower level.
  Field Configuration: The fields in question may not be configured to accept values at the specified level, leading to this error.
  Data Entry Error: There may be a mistake in the