Message type: E = Error
Message class:  PPC1DM - PP Backflush: Database Management and Communication 
Message number: 029
Message text: One production line was copied several times
When attempting to receive several line/reporting point versions, the
system determined that the production line &V1& was transferred several
times in version &V2&.
The system has not posted any of the transferred line/reporting point
versions.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message PPC1DM029, which states "One production line was copied several times," typically occurs in the context of production planning and control within the SAP system. This error indicates that there is a duplication of production line entries in the system, which can lead to inconsistencies and errors in production planning.
Cause: Duplicate Entries: The most common cause of this error is that the same production line has been inadvertently copied multiple times during the configuration or setup process. Data Migration Issues: If data has been migrated from another system or if there have been manual entries, it is possible that duplicates were created. Configuration Errors: Incorrect configuration settings in the production planning module can lead to the same production line being referenced multiple times.
Solution: Identify Duplicates: Use transaction codes like PPC1 or PPC2 to review the production lines and identify where the duplicates exist. Check the relevant tables (e.g., CRHD for work centers)
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