Column headers repeated

Two or more columns share a header, or have headers that differ only in upper and lower case. Every column is kept: each repeat is read under its header with _2, _3 and so on added. A mapping that finds a field by that header reads the first of these columns. This is reported when the file is uploaded, when Import Data reads it in a run, and when a scenario table is saved.

What to do

Rename the columns so each header is distinct, or remove the duplicate column, and upload the file again. To use a later column as it is, map the field to its suffixed name.

Where it comes from

Shown by Create Scenario, Import Data. It is one of the messages about a node.