Message type: E = Error
Message class:  FINS_FI_DEFSUM - Deferred Summarization 
Message number: 003
Message text: Data processing for project &1 is already complete.
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
Unfortunately, there isn't any extra information in this error notice.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message FINS_FI_DEFSUM003 indicates that data processing for a specific project (identified by &1) has already been completed. This error typically arises in the context of financial data processing, particularly in projects related to financial accounting or controlling.
Cause: Duplicate Processing: The most common cause of this error is an attempt to process data for a project that has already been processed. This can happen if a user tries to run a report or execute a transaction that has already been completed for that project. Incorrect Status: The project may have been set to a status that indicates it is closed or completed, preventing further processing. System Configuration: There may be configuration settings in the SAP system that restrict processing for completed projects.
Solution: Check Project Status: Verify the status of the project in question. If the project is indeed completed, you may need to review whether further processing is necessary or if adjustments
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
FINS_FI_DEFSUM002 Data processing for project &1 hasn't started.
What causes this issue?  Since data processing hasn't started, the selected function isn't supported.System Response  The system issues an e...
FINS_FI_DEFSUM001 Data processing for project &1 has already started.
What causes this issue?  Since data processing has already started, the selected function isn't supported.System Response  The system issues an e...
FINS_FI_DEFSUM004 Data processing for project &1 hasn't completed
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FINS_FI_DEFSUM005 Activities of project &1 are currently processing.
What causes this issue?  Activities of project &V1& are currently executing.System Response  The system issues an error message and will not a...
Click on this link to search all SAP messages.