关于osworkflow的数据库外键约束问题!help

osworkflow自带的例子运行是能登陆进去,但是到这一步
Requeue Editing和Peer Review 时就报错了.sql是osworkflow 自身带的,请高人指点. 谢谢,,,,,,

com.opensymphony.workflow.StoreException: Unable to create current step for workflow instance #30: root cause: Cannot add or update a child row: a foreign key constraint fails (`osworkflowdb`.`os_currentstep`, CONSTRAINT `os_currentstep_ibfk_2` FOREIGN KEY (`OWNER`) REFERENCES `os_user` (`USERNAME`))
com.opensymphony.workflow.spi.jdbc.JDBCWorkflowStore.createCurrentStep(JDBCWorkflowStore.java:166)
com.opensymphony.workflow.AbstractWorkflow.createNewCurrentStep(AbstractWorkflow.java:1509)
com.opensymphony.workflow.AbstractWorkflow.transitionWorkflow(AbstractWorkflow.java:1256)
com.opensymphony.workflow.AbstractWorkflow.doAction(AbstractWorkflow.java:567)
org.apache.jsp.test_jsp._jspService(test_jsp.java:63)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

com.mysql.jdbc.exceptions.MySQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails (`osworkflowdb`.`os_currentstep`, CONSTRAINT `os_currentstep_ibfk_2` FOREIGN KEY (`OWNER`) REFERENCES `os_user` (`USERNAME`))
com.mysql.jdbc.SQLError.createSQLException(SQLError.java:931)
com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2985)
com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1631)
com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1723)
com.mysql.jdbc.Connection.execSQL(Connection.java:3256)
com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1313)
com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1585)
com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1500)
com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1485)
org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:101)
com.opensymphony.workflow.spi.jdbc.JDBCWorkflowStore.createCurrentStep(JDBCWorkflowStore.java:833)
com.opensymphony.workflow.spi.jdbc.JDBCWorkflowStore.createCurrentStep(JDBCWorkflowStore.java:161)
com.opensymphony.workflow.AbstractWorkflow.createNewCurrentStep(AbstractWorkflow.java:1509)
com.opensymphony.workflow.AbstractWorkflow.transitionWorkflow(AbstractWorkflow.java:1256)
com.opensymphony.workflow.AbstractWorkflow.doAction(AbstractWorkflow.java:567)
org.apache.jsp.test_jsp._jspService(test_jsp.java:63)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)