如何解决实体Grails映射中的重复列？

我有这门课：

class TFTire implements Serializable {
    TFTireProperty propertyMake
    TFTireProperty propertySize

这个映射：

static mapping = {
    version false
    table 'TF_TIRE'
    id composite:['siteID','idRec'], generator: "assigned"
    columns {
        idRec column: 'IDRec'
        siteID column: 'SiteID'
        propertyMake {
            column name: "siteID", joinTable: true
            column name: "IFPropertyMake"
        }
        propertySize {
            column name: "SiteID", joinTable: true
            column name: "IFPropertySize"
        }

如果我只保留一个属性，它就可以正常工作。但我需要引用两个以上的TFTireProperty对象。而且密钥始终是siteID和IFPropertySomething

其中有两个错误：

Caused by MappingException: Repeated column in mapping for entity: com.mdw360.TFTire column: SiteID (should be mapped with insert="false" update="false")
->>  262 | run       in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|   1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
|    615 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^    745 | run       in java.lang.Thread

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为什么要将propertyMake和propertySize映射到同一列中？数据库已经像这样映射了。。。我们只是在维护这个系统。TFTire列有三个不同的列，如IFPropertyMake IFPropertySize和IFPropertyType。。。它们是TFTireProperty的密钥，它的主键是我需要加入TFTire的siteID和IDRec。。。