WebSphere Commerce 7 | Payment Instructions are Failing | NullPointerException on "createPaymentInstruction"

In my toolkit, few of the data got corrupted and when I try to test the payment pages, it is throwing the following exception,

[4/18/16 9:53:41:332 GMT] 0000006b RemoteExcepti E   CNTR0020E: EJB threw an unexpected (non-declared) exception during invocation of method "createPaymentInstruction" on bean "BeanId(WC_live#Payments-Plugin-Controller.jar#PluginController, null)". Exception data: java.lang.NullPointerException
        at java.util.Hashtable.put(Hashtable.java:877)
        at com.ibm.commerce.payments.plugincontroller.PluginController.getPlugin(PluginController.java:2908)
        at com.ibm.commerce.payments.plugincontroller.PluginController.createPaymentInstruction(PluginController.java:986)
        at com.ibm.commerce.payments.plugincontroller.beans.EJSRemoteStatelessPluginController_c947b422.createPaymentInstruction(EJSRemoteStatelessPluginController_c947b422.java:399)
        at com.ibm.commerce.payments.plugincontroller.beans._PluginController_Stub.createPaymentInstruction(_PluginController_Stub.java:2511)
        at com.ibm.commerce.payment.actions.commands.EditPaymentInstructionPolicyCmdImpl.createPaymentInstruction(EditPaymentInstructionPolicyCmdImpl.java:633)
        at com.ibm.commerce.payment.actions.commands.EditPaymentInstructionPolicyCmdImpl.performExecute(EditPaymentInstructionPolicyCmdImpl.java:244)
        at com.ibm.commerce.command.ECCommandTarget.executeCommand(ECCommandTarget.java:157)
        at com.ibm.ws.cache.command.CommandCache.executeCommand(CommandCache.java:332)
        at com.ibm.websphere.command.CacheableCommandImpl.execute(CacheableCommandImpl.java:166)
        at com.ibm.commerce.command.MeasuredCacheableCommandImpl.execute(MeasuredCacheableCommandImpl.java:63)
        at com.ibm.commerce.command.AbstractECTargetableCommand.execute(AbstractECTargetableCommand.java:199)
        at com.ibm.commerce.edp.commands.EditCmdImpl.setupAndCreatePaymentInstruction(EditCmdImpl.java:2516)
        at com.ibm.commerce.edp.commands.EditCmdImpl.addPaymentInstruction(EditCmdImpl.java:1039)
        at com.ibm.commerce.edp.commands.EditCmdImpl.processNewPIOperation(EditCmdImpl.java:1726)
        at com.ibm.commerce.edp.commands.EditCmdImpl.processIndividualPIEditOperation(EditCmdImpl.java:1706)
        at com.ibm.commerce.edp.commands.EditCmdImpl.processFG(EditCmdImpl.java:783)
        at com.ibm.commerce.edp.commands.EditCmdImpl.performExecute(EditCmdImpl.java:438)
        at com.ibm.commerce.command.ECCommandTarget.executeCommand(ECCommandTarget.java:157)
        at com.ibm.ws.cache.command.CommandCache.executeCommand(CommandCache.java:332)
...............
...............
Caused by: com.ibm.commerce.exception.ECApplicationException: The payment system encounters an error when updating the payment instructions of order 131,006. GenericSystemError
        at com.ibm.commerce.edp.commands.PIAddCmdImpl.addPI(PIAddCmdImpl.java:502)
        at com.ibm.commerce.edp.commands.PIAddCmdImpl.performExecute(PIAddCmdImpl.java:360)
        at com.ibm.commerce.command.ECCommandTarget.executeCommand(ECCommandTarget.java:157)
        at com.ibm.ws.cache.command.CommandCache.executeCommand(CommandCache.java:332)
        at com.ibm.websphere.command.CacheableCommandImpl.execute(CacheableCommandImpl.java:166)
        at com.ibm.commerce.command.MeasuredCacheableCommandImpl.execute(MeasuredCacheableCommandImpl.java:63)
        at com.ibm.commerce.command.AbstractECTargetableCommand.execute(AbstractECTargetableCommand.java:199)
        at com.ibm.commerce.foundation.server.command.soi.MessageMappingCmdImpl.invokeCommand(MessageMappingCmdImpl.java:229)


Issue might have happened because your MERCHCONFINFO Tables doesn't have proper entries. Try to correct entries between MERCHCONF and MERCHCONFINFO Tables and it should work fine