Rules / Naming Conventions
Partition name should match table name for single partition tables
What it checks
Regular tables with exactly one partition whose name differs from the table name. Calculated tables and calculation groups are not checked.
Why it matters
A single-partition table has no reason for its partition to carry a different name, and when it does it is usually the table's old name from before a rename. Refresh logs, error messages, and the TMDL file all name the partition, so a mismatch sends the reader looking for a table that no longer exists.
How to fix it
Rename the partition in the TMDL file: the line partition 'Old Name' = m becomes partition 'Table Name' = m. Power BI Desktop names the partition after the table when it creates it, so on a Desktop project this usually points at a hand edit or a migrated model.