Program: 89357
Project: 89357
Buggy source:
/** 
 * @see org.alfresco.module.org_alfresco_module_rm.RecordsManagementAdminService#updateCustomPropertyDefinitionName(org.alfresco.service.namespace.QName,java.lang.String)
 */
public QName updateCustomPropertyDefinitionName(QName propQName,String newName) throws CustomMetadataException {
  ParameterCheck.mandatory("String_Node_Str",propQName);
  PropertyDefinition propDefn=dictionaryService.getProperty(propQName);
  if (propDefn == null) {
    throw new AlfrescoRuntimeException(I18NUtil.getMessage(MSG_PROP_EXIST,propQName));
  }
  if (newName == null) {
    return propQName;
  }
  QName newPropQName=getQNameForClientId(newName);
  if (newPropQName != null) {
    PropertyDefinition newPropDefn=dictionaryService.getProperty(newPropQName);
    if (newPropDefn != null && propDefn.equals(newPropDefn) == false) {
      String propIdAsString=newPropQName.toPrefixString(namespaceService);
      throw new PropertyAlreadyExistsMetadataException(propIdAsString);
    }
  }
  NodeRef modelRef=getCustomModelRef(propQName.getNamespaceURI());
  M2Model deserializedModel=readCustomContentModel(modelRef);
  M2Property targetProperty=findProperty(propQName,deserializedModel);
  targetProperty.setName(new StringBuilder().append(RecordsManagementCustomModel.RM_CUSTOM_PREFIX).append(QName.NAMESPACE_PREFIX).append(newName).toString());
  targetProperty.setTitle(URLDecoder.decode(newName));
  writeCustomContentModel(modelRef,deserializedModel);
  if (logger.isInfoEnabled()) {
    logger.info("String_Node_Str" + propQName + "String_Node_Str"+ newName);
  }
  return propQName;
}

Fixed version (ground truth):
/** 
 * @see org.alfresco.module.org_alfresco_module_rm.RecordsManagementAdminService#updateCustomPropertyDefinitionName(org.alfresco.service.namespace.QName,java.lang.String)
 */
public QName updateCustomPropertyDefinitionName(QName propQName,String newName) throws CustomMetadataException {
  ParameterCheck.mandatory("String_Node_Str",propQName);
  PropertyDefinition propDefn=dictionaryService.getProperty(propQName);
  if (propDefn == null) {
    throw new AlfrescoRuntimeException(I18NUtil.getMessage(MSG_PROP_EXIST,propQName));
  }
  if (newName == null) {
    return propQName;
  }
  QName newPropQName=getQNameForClientId(newName);
  if (newPropQName != null) {
    PropertyDefinition newPropDefn=dictionaryService.getProperty(newPropQName);
    if (newPropDefn != null && !propDefn.equals(newPropDefn)) {
      String propIdAsString=newPropQName.toPrefixString(namespaceService);
      throw new PropertyAlreadyExistsMetadataException(propIdAsString);
    }
  }
  NodeRef modelRef=getCustomModelRef(propQName.getNamespaceURI());
  M2Model deserializedModel=readCustomContentModel(modelRef);
  M2Property targetProperty=findProperty(propQName,deserializedModel);
  targetProperty.setName(new StringBuilder().append(RecordsManagementCustomModel.RM_CUSTOM_PREFIX).append(QName.NAMESPACE_PREFIX).append(newName).toString());
  targetProperty.setTitle(URLDecoder.decode(newName));
  writeCustomContentModel(modelRef,deserializedModel);
  if (logger.isInfoEnabled()) {
    logger.info("String_Node_Str" + propQName + "String_Node_Str"+ newName);
  }
  return propQName;
}