I inadvertently discovered that importing an excel file of custom module data does not do any form of field matching so when you import the data for a custom module for one client into another client’s custom module, Treepl quite happily imports the data to the wrong data file and client without a care in the world.
Surely we should have the import checking for a match on field names provided in row 1 of the import file against the custom module you are importing into?