Hi, Jackchan.
Since the error that you shared is related to Confluence, I went ahead and added a Confluence tag to this question for clarity. I hope you are fine with that.
Meanwhile, the error shown during the import indicates that the property user is missing from the class InternalUserAttribute within the package com.atlassian.crowd.model.user.
In the XML backup, I noticed that there are a few XML backup that does not contain the user property. An example of a broken class:
<object class="InternalUserAttribute" package="com.atlassian.crowd.model.user">
<id name="id">10977281</id>
<property name="directory" class="DirectoryImpl" package="com.atlassian.crowd.model.directory"><id name="id">294914</id>
</property>
<property name="name"><![CDATA[invalidPasswordAttempts]]></property>
<property name="value"><![CDATA[14]]></property>
<property name="lowerValue"><![CDATA[14]]></property>
</object>
On the other hand, an example with the user property will look like this:
<object class="InternalUserAttribute" package="com.atlassian.crowd.model.user">
<id name="id">9011201</id>
<property name="user" class="InternalUser" package="com.atlassian.crowd.model.user"><id name="id">426023</id>
</property>
<property name="directory" class="DirectoryImpl" package="com.atlassian.crowd.model.directory"><id name="id">294914</id>
</property>
<property name="name"><![CDATA[invalidPasswordAttempts]]></property>
<property name="value"><![CDATA[4]]></property>
<property name="lowerValue"><![CDATA[4]]></property>
</object>
Notice the absence of user in the first example.
Moving forward, can you go through the entities.xml file to locate the missing attribute and remove the whole object class for each bad entry and try to import again?
<object class="InternalUserAttribute" package="com.atlassian.crowd.model.user">
...
...
...
until
</object>
Let me know it goes on your end. Thanks.
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