AX 2012 RapidStart main accounts template

While attempting to use Main accounts_Services template in the General Ledger I am finding that column ‘P’ has a required field that is called ‘Reference’, it is proving very allusive to track down what reference it is looking for.  Below are 2 of the errors, the first was to long, and the second is if the field is blank. I did expect the second error for a required field except by default the field is blank in the downloaded default template.  Can anyone point me to some documentation for this template or tell me what table/column this is?

Infolog:                                              MainAccount.createList  Line=3, Pos=4, Xpath=/MainAccount/MainAccount[1]     The value in field LedgerChartOfAccounts is invalid.Field 'Reference' must be filled in. 

Error found when validating record.Field 'Reference' must be filled in. 

Error found when validating record.  MainAccount.createList          Line=15, Pos=4, Xpath=/MainAccount/MainAccount[2]     The value in field LedgerChartOfAccounts is invalid.Field 'Reference' must be filled in.        Error found when validating record.Field 'Reference' must be filled in.  Error found when validating record.          MainAccount.createList  Line=27, Pos=4, Xpath=/MainAccount/MainAccount[3]     The value in field LedgerChartOfAccounts is invalid.Field 'Reference' must be filled in.        Error found when validating record.Field 'Reference' must be filled in.  Error found when validating record.          MainAccount.createList  Line=39, Pos=4, Xpath=/MainAccount/MainAccount[4]     The value in field LedgerChartOfAccounts is invalid.Field 'Reference' must be filled in.       

Error found when validating record.Field 'Reference' must be filled in.        

Error found when validating record.

Error generated if it is blank (and by default the field is blank in the default template)

Infolog:MainAccount.createListLine=3, Pos=4, Xpath=/MainAccount/MainAccount[1]        The value in field LedgerChartOfAccounts is invalid.Field 'Reference' must be filled in.                                                Error found when validating record.Field 'Reference' must be filled in.                                                      Error found when validating record.                                                       MainAccount.createList               Line=18, Pos=4, Xpath=/MainAccount/MainAccount[2]     The value in field LedgerChartOfAccounts is invalid.Field 'Reference' must be filled in.                                                         Error found when validating record.Field 'Reference' must be filled in.                                                      Error found when validating record.                                        Creation has been canceled.Message:Creation has been canceled.Reason:Creation has been canceled.Details/Error in fields:,