Message type: E = Error
Message class:  CNV_PE_S4 - Messages for Posting Engine S/4 Content 
Message number: 055
Message text: Variant table &1 filled with entries overwrite not possible
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The SAP error message CNV_PE_S4055 indicates that a variant table (typically used in the context of data migration or conversion) is filled with entries, and therefore, an overwrite operation is not possible. This error usually occurs during data migration processes, particularly when using SAP's tools for data conversion, such as the SAP S/4HANA Migration Cockpit or other data transfer tools.
Cause: The primary cause of this error is that the variant table specified (denoted by &1 in the error message) already contains entries. When the system attempts to overwrite or modify the existing entries in the variant table, it encounters this restriction, leading to the error.
Solution: To resolve this error, you can take the following steps: Check Existing Entries: Review the contents of the variant table to understand what entries are currently present. You can do this by accessing the relevant transaction or using a report that displays the contents of the variant table. Delete
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