SYSML2 — Association end name " /usageWithDirectedUsage" has a typo

In Figure 8. Definition and Usage (subclause 8.3.6.1), the opposite association end to Usage::directedUsage appears on the diagram as /usageWithDirectedUsage, where the slash indicates it is derived, and the property name is usageWithDirectedUsage. However, in the normative XMI for the abstract syntax, the property is not derived an it has the name  /usageWithDirectedUsage (it starts with a space and a slash).