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インデックスIX_C753170Cの一意制約違反に関するエラーがログにあります；
ERROR [default task-177][JDBCExceptionReporter:234] ORA-00001: unique constraint (LPORTAL73.IX_C753170C) violated_ [Sanitized]
ERROR [default task-177][PortletServlet:119] javax.portlet.PortletException: org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update
javax.portlet.PortletException: org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update at com.liferay.portal.kernel.portlet.bridges.mvc.BaseMVCActionCommand.processAction(BaseMVCActionCommand.java:69) at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.callActionMethod(MVCPortlet.java:357) at com.liferay.portal.kernel.portlet.LiferayPortlet.processAction(LiferayPortlet.java:89)
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