The double backslash indicates a multi-value field.
You have to use an action of the type "Merge duplicate fields" and apply a different separator than the \\, e.g. &.
see e.g. here:
The double backslash indicates a multi-value field.
You have to use an action of the type "Merge duplicate fields" and apply a different separator than the \\, e.g. &.
see e.g. here: