Message type: E = Error
Message class:  FIN_SEPA - Messages for Mandates in FIN 
Message number: 002
Message text: Mandate &1 / &2 already exists with payer &3 and payee &4
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 FIN_SEPA002 indicates that there is an attempt to create a SEPA mandate that already exists for the specified payer and payee. This error typically arises in the context of managing SEPA (Single Euro Payments Area) mandates, which are used for direct debit transactions in Europe.
Cause: The error occurs when: A mandate with the same mandate ID (or reference) already exists for the specified payer (the customer) and payee (the vendor or service provider). The system is trying to create a new mandate without checking for existing ones, leading to a conflict.
Solution: To resolve this error, you can take the following steps: Check Existing Mandates: Use the relevant transaction code (e.g., BP for Business Partner) to check if the mandate already exists for the specified payer and payee. Look for the mandate ID and verify its details. Use Existing Mandate: If the mandate already exists and is valid, you can use it instead of trying to
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
FIN_SEPA001 No company code exists with the creditor identifier &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FIN_RE_REP_MESSAGES100 Feature & is not supported.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FIN_SEPA004 Value of field '&1' is not equal to '&2' or '&3'
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FIN_SEPA005 The transaction type of mandates for one-time documents has to be '1'
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.