How To Fix 1F002 - &1 is already in root account &2 for the period &3 &4

1F002 - Overview

• Message type: E = Error

• Message class: 1F - BKK: Beziehungen

• Message number: 002

• Message text: &1 is already in root account &2 for the period &3 &4

What causes this issue?

An account or root account which is to be placed in the hierarchy is
already present in another hierarchy. The two hierarchies overlap with
respect to time. (Every account within a relation type may only be
contained in one and only one hierarchy for each day)
If a hierarchy is created using a copy of another hierarchy, every
account underneath the root account of the source hierarchy is checked
to see whether it can be copied to the new hierarchy. If the account
is contained in another hierarchy and the two overlap time-wise, then
this error message is generated.

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?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 1F002 - &1 is already in root account &2 for the period &3 &4 ?

  The SAP error message 1F002 typically indicates that there is an issue with the assignment of a root account for a specific period. The message format suggests that the system is trying to inform you that a certain account (represented by &1) is already designated as a root account for a specific period (represented by &3) and possibly for a specific entity or organizational unit (represented by &2 and &4).
  
  Cause:
  
  Duplicate Assignment: The account you are trying to assign as a root account is already assigned as a root account for the specified period.
  Configuration Error: There may be a configuration issue in the system where the same account is being attempted to be set as a root account multiple times for overlapping periods.
  Data Entry Error: There could be a mistake in data entry where the same account is inadvertently being selected.
  
  
  Solution:
  
  Check Existing Assignments: Review the current assignments for the account in