java.sql.SQLException: ORA-01427: single-row subquery returns more than one row

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java.sql.SQLException: ORA-01427: single-row subquery returns more than one row
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:331)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:288)
at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:745)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:216)
at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:966)
at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1062)
at oracle.jdbc.driver.T4CPreparedStatement.executeMaybeDescribe(T4CPreparedStatement.java:850)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1134)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3339)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3384)
at oracle.apps.xdo.dataengine.XMLPGEN.processQuery(XMLPGEN.java:1947)
at oracle.apps.xdo.dataengine.XMLPGEN.processSQLDataSource(XMLPGEN.java:501)
at oracle.apps.xdo.dataengine.XMLPGEN.writeData(XMLPGEN.java:445)
at oracle.apps.xdo.dataengine.XMLPGEN.writeGroupStructure(XMLPGEN.java:308)
at oracle.apps.xdo.dataengine.XMLPGEN.processData(XMLPGEN.java:273)
at oracle.apps.xdo.dataengine.XMLPGEN.processXML(XMLPGEN.java:215)
at oracle.apps.xdo.dataengine.XMLPGEN.writeXML(XMLPGEN.java:254)
at oracle.apps.xdo.dataengine.DataProcessor.processDataStructre(DataProcessor.java:390)
at oracle.apps.xdo.dataengine.DataProcessor.processData(DataProcessor.java:355)
at oracle.apps.xdo.oa.util.DataTemplate.processData(DataTemplate.java:348)
at oracle.apps.xdo.oa.cp.JCP4XDODataEngine.runProgram(JCP4XDODataEngine.java:293)
at oracle.apps.fnd.cp.request.Run.main(Run.java:157)

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