correct comment

libraries/botbuilder-core/src/botState.ts

@@ -51,7 +51,7 @@ export class BotState implements PropertyManager {
      * Creates a new property accessor for reading and writing an individual property to the bot
      * states storage object.
      * @param T (Optional) type of property to create. Defaults to `any` type.
-     * @param name Name of the property to add. Must be unique within the set.
+     * @param name Name of the property to add.
      */
     public createProperty<T = any>(name: string): StatePropertyAccessor<T> {
         const prop: BotStatePropertyAccessor<T> = new BotStatePropertyAccessor<T>(this, name);