Multiple initializer values for default property, 'dataProvider', of type 'mx.collections.IList'.

Question

Hi, Looking at answers to similar questions it sounds as if this error comes from a simple mistake but I cannot seem to find it

I have a set of buttons for each letter of the alphabet. When a user clicks one a list of sport players is returned in a drop down list. The user then clicks on a name to get more information about that player. I have a menu listing different sports and the selection of one changes the state. In this example there are 2 states MLB and EPL

The button click actions this protected function callButton_clickHandler(event:MouseEvent):void { var buttonInitial:String = event.target.label; if (currentState == "EPL"){ getEPLPlayersResult.token = scraping.getEPLPlayers(buttonInitial);

            } 
            if (currentState == "MLB"){
                getMLBPlayersResult.token = scraping.getMLBPlayers(buttonInitial);

            }

I then have callresponders

and the dropdown lists

    <s:DropDownList width="165" 
        id="MLBddl" 
        labelField="fullName"                  change="dropDownList_changeHandler(event)"
         includeIn="MLB">

    <s:DropDownList width="165" 
        id="EPLddl" 
        labelField="fullName"
        change="dropDownList_changeHandler(event)"
         includeIn="EPL">
            <s:AsyncListView  id="EPLalv"   list="{TypeUtility.convertToCollection(getEPLPlayersResult.lastResult)}"/>
    </s:DropDownList>

the dropDownList_changeHandler gets the further info dependent on player selected and currentstate

I am getting the error showing at the 'include in "EPL" ' and following AsyncListView lines

Any help much appreciated