Very new to ArcPro and have hit a wall. I can't seem to find a solution anywhere so here goes...
Using Field Calculator to populate a new Text (50) field.
In ArcMap I would have entered [Field1] & "-" & [Field2].
In ArcPro I've entered !Field1! + '-' + !Field2!.
The '-' turns red and the process fails. I've also tried "-".
Expression type set to Python3.
Advice on this seemingly simple task?