Message type: E = Error
Message class:  FI - TR-FM Funds Management 
Message number: 054
Message text: Caution: budget exists; you must reconstruct distributed values
You have made changes to a master data hierarchy (funds
center/commitment item) which you have already budgeted.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Start the program to reconstruct the distributed values to ensure that
the budget allocated up to now is redistributed in accordance with the
hierarchy change you have made.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message FI054 ("Caution: budget exists; you must reconstruct distributed values") typically occurs in the context of budget management within the SAP system, particularly when dealing with budget availability checks in the Financial Accounting (FI) or Controlling (CO) modules. This message indicates that there is a budget already assigned to a particular cost center, internal order, or other budget-related objects, and that the system requires you to adjust or reconstruct the distributed values before proceeding with the transaction.
Cause:
Existing Budget: The error arises when there is an existing budget for the specified period, and the system detects that the values being posted or distributed do not align with the budgetary constraints.
Distribution Issues: The values being distributed across different cost centers or internal orders may not match the budgeted amounts, leading to discrepancies.
Budgeting Configuration: There may be issues with the configuration of budgetary controls, such as the budget version or Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
FI053 Item & contains commitment item with fin. trans. other than 30
What causes this issue?  Item &V1& contains a commitment item with a <DS:GLOS.financial_transaction>financial transaction</> other...
FI052 Make no postings to the default funds center in the FM area
What causes this issue?  The default funds center automatically receives all posting data which could not be assigned to a funds center when a posting...
FI055 Caution: actual data exists.  Reconstruct assigned values
What causes this issue?  You have made changes to a master data hierarchy (funds center/commitment item) to which you have already made postings.Syste...
FI056 You have not assigned a controlling area to company code &
What causes this issue?  You have activated the Project Cash Management component for this company code.  However, no controlling area was assigned to...
Click on this link to search all SAP messages.