reference information missing or data type wrong using abap cds views with entity

@AbapCatalog.viewEnhancementCategory: [#NONE]

@AccessControl.authorizationCheck: #NOT_REQUIRED

@EndUserText.label: ‘PLANNING DATA’

//@Metadata.ignorePropagatedAnnotations: true

//@ObjectModel.usageType:{

// serviceQuality: #X,

// sizeCategory: #S,

// dataClass: #MIXED

//}

define view entity ZI_PLANNING as select from ZPS_REVENUE_PLAN

{

key proj_def as ProjDef,

key wbs_no as WbsNo,

key item_no as ItemNo,

key zyear as Zyear,

key vsn as Vsn,

tcurr as Tcurr,

deptm as Deptm,

dept_desc as DeptDesc,

prart_lvl4 as PrartLvl4,

prart_lvl5 as PrartLvl5,

prart_lvl6 as PrartLvl6,

prart_des4 as PrartDes4,

prart_des5 as PrartDes5,

prart_des6 as PrartDes6,

mon_1 as Mon1,

mon_2 as Mon2,

mon_3 as Mon3,

mon_4 as Mon4,

mon_5 as Mon5,

mon_6 as Mon6,

mon_7 as Mon7,

mon_8 as Mon8,

mon_9 as Mon9,

mon_10 as Mon10,

mon_11 as Mon11,

mon_12 as Mon12,

created_date as CreatedDate,

changed_date as ChangedDate,

created_by as CreatedBy,

changed_by as ChangedBy,

del_ind as DelInd,

remark as Remark,

tot_cost as TotCost,

tot_rev_cst as TotRevCst,

status as Status,

proj_def_back as ProjDefBack,

wbs_def_back as WbsDefBack,

billable as Billable

}