task have 2 branch

[vinaxwater]

I have a problem that: from a task have 2 branch
branch 1: to end-state
branch 2: to other task with user assigneed
I run this process with branch is succesful but in branch 1 is error: bpm_assignee is not provided. Please for me idea about design processs. Thanks!

[vinaxwater]

<aspect name="bpm:groupAssignees">
     <associations>
         <association name="bpm:groupAssignees">
             <source>
               <mandatory>false</mandatory>
               <many>false</many>
             </source>
             <target>
             <!– TODO: Refactor when group is pulled into content model –>
                <class>cm:person</class>
                [b]<mandatory>false</mandatory>[/b]
                <many>true</many>
             </target>
        </association>
    </associations>
</aspect>
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I have got it with solution change in tab <mandatory></mandatory> value true to false

Regards.