Data Transform gets warning to set negative integer [7.3.1]
When I set a negative integer, like -1, to an integer property using a Data Transform, I get a warning "The source '-1' is ambiguous and is being treated as text. If it is a page, add it to the Pages and Classes tab."
Why -1 is treated as text? Is it expected behavior? If so, how can I set a negative integer using a Data Transform without getting a warning?