[midPoint] Error: More than one items matching uid in container attributes..

[Prabhakara Rao Doddapaneni]

The resource (databasetable) is haveing a field 'uid' in its schema.  The schema handling for the field is configured as following:
         <attribute>            <c:ref>ri:uid</c:ref>            <tolerant>true</tolerant>            <exclusiveStrong>false</exclusiveStrong>            <inbound>               <authoritative>true</authoritative>               <exclusive>false</exclusive>               <strength>normal</strength>               <target>                  <c:path>$user/name</c:path>               </target>            </inbound>         </attribute>
When I try to get the accounts on the resource, it is failing with the following exception:
Caused by: com.evolveum.midpoint.util.exception.SchemaException: More than one items matching uid in container attributes at com.evolveum.midpoint.prism.PrismContainerValue.findItemByQName(PrismContainerValue.java:691) ~[prism-3.5.0-SNAPSHOT.jar:na] at com.evolveum.midpoint.prism.PrismContainerValue.findCreateItem(PrismContainerValue.java:597) ~[prism-3.5.0-SNAPSHOT.jar:na] at com.evolveum.midpoint.prism.PrismContainerValue.findItem(PrismContainerValue.java:579) ~[prism-3.5.0-SNAPSHOT.jar:na]
Can anybody help me know what causes this exception?
Thanks,Prabhakar
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