i getting error in sqlserver stored poc

ALTER  PROCEDURE [dbo].[Redeemvoucherverify]
(
     @amount as decimal 
    ,@mobileNO  Bigint   
    ,@SecurCode as int    
    ,@BillNO as varchar(10)
    ,@adminID as int 
    ,@Retvalue as int out 
) 
AS
BEGIN

---Mychanges 
Create Table #tbl_RedeemMaster (CORF NVARCHAR(255,CORFID NVARCHAR(255),Role NVARCHAR(255),CreatedBy NVARCHAR(255),CreatedDate DATETIME)
----------

set @Retvalue =0
declare @code int 
set @code=0 
select  @code = Securecode  from RedeemMaster Where Securecode =@SecurCode
if ( @code !=0 )
begin  
declare @amount1 int
declare @amount2 int
declare @a1 decimal,@a2 decimal,@a3 decimal ,@aa2 decimal,@aa3 decimal
set @mobileno=@mobileNO
set @BillNo=@BillNO
set @amount=@amount
set @SecurCode=@SecurCode
set @a1=@amount
set @aa2 =(select AllocatedAmount  from ConsumerMaster  where MobileNo =@mobileno)
While @aa2>=@a1@a1 and @a1!=0 
BEGIN
set @a2=(select top (1) UpdatedAmount from AllocateMaster  Where MobileNo=@mobileno and UpdatedAmount!=0 and   ExpireDate >=GETDATE() and Status=1 and AllocateFrom='C' and AllocateFromID=@adminID )
set @a3=(select AllocatedAmount  from ConsumerMaster  where MobileNo =@mobileno) 
if(@a1<@a2)
 begin
      Update RedeemMaster set Status=1,BillNo=@BillNO Where MobileNo=@mobileno and Securecode=@SecurCode
      insert into RedeemMaster (AllocatedID,Amount,MobileNo,BillNo,Securecode,Status) values ((select top (1) AllocateID from AllocateMaster  Where MobileNo=@mobileno and UpdatedAmount!=0 and   ExpireDate >=GETDATE() and Status=1 and AllocateFrom='C' and AllocateFromID=@adminID),@a1,@mobileno,@BillNo,@SecurCode,1)
      
      ---Mychanges 
      Insert Into #tbl_RedeemMaster 
      (select CORF,CORFID,Role,CreatedBy,CreatedDate from RedeemMaster Where RedeemedAmount=@amount and Securecode=@SecurCode)
      
      update RedeemMaster set CORF=tb.CORF,CORFID=,Role=tb.CORFID,CreatedBy=tb.CreatedBy,CreatedDate=tb.CreatedDate
      From #tbl_RedeemMaster tb
      Where Amount=@a1
      ---------------------
      
      Update top (1) AllocateMaster set UpdatedAmount=ISNULL(UpdatedAmount,0)-@a1,UtiltizedAmount=ISNULL(UtiltizedAmount,0)+@a1 Where MobileNo=@mobileno and UpdatedAmount!=0 and   ExpireDate >=GETDATE() and Status=1 and AllocateFromID=@adminID and AllocateFrom='C'                 
      Update ConsumerMaster set AllocatedAmount=ISNULL(AllocatedAmount,0)-@a1,RedeemedAmount =ISNULL(RedeemedAmount,0)+@a1 where MobileNo=@mobileno  and AllocatedAmount!=0
      set @a1=@a1-@a2
 end

if(@a1>=@a2)
  begin
      Update RedeemMaster set Status=1,BillNo=@BillNO Where MobileNo=@mobileno and Securecode=@SecurCode
       declare @a4 int
       set @a4=(select top (1) UpdatedAmount from AllocateMaster  Where MobileNo=@mobileno and UpdatedAmount!=0 and   ExpireDate >=GETDATE() and Status=1 and AllocateFrom='C' and AllocateFromID=@adminID)
       Update ConsumerMaster set AllocatedAmount=ISNULL(AllocatedAmount,0)-@a4,RedeemedAmount =ISNULL(RedeemedAmount,0)+@a4 where MobileNo=@mobileno  and AllocatedAmount!=0
       --Update RedeemMaster set Status=1,BillNo=@BillNO, AllocatedID =(select top(1)AllocateID from AllocateMaster Where MobileNo=@mobileno and Status=1 and ExpireDate>=GETDATE()and UpdatedAmount!=0 and Status=1) Where MobileNo=@mobileno and Securecode=@SecurCode
       insert into RedeemMaster (AllocatedID,Amount,MobileNo,BillNo,Securecode,Status) values ((select top (1) AllocateID from AllocateMaster  Where MobileNo=@mobileno and UpdatedAmount!=0 and   ExpireDate >=GETDATE() and Status=1),@a4,@mobileno,@BillNo,@SecurCode,1)
       update RedeemMaster set CORF=(select CORF from RedeemMaster Where RedeemedAmount=@amount and Securecode=@SecurCode),CORFID=(select CORFID from RedeemMaster Where RedeemedAmount=@amount and Securecode=@SecurCode),Role=(select Role from RedeemMaster Where RedeemedAmount=@amount and Securecode=@SecurCode),CreatedBy=(select CreatedBy from RedeemMaster Where RedeemedAmount=@amount and Securecode=@SecurCode),CreatedDate=(select CreatedDate from RedeemMaster Where RedeemedAmount=@amount and Securecode=@SecurCode) Where Amount=@a4
       Update top (1) AllocateMaster set UpdatedAmount=ISNULL(UpdatedAmount,0)-@a4,UtiltizedAmount=ISNULL(UtiltizedAmount,0)+@a4 Where MobileNo=@mobileno and UpdatedAmount!=0 and   ExpireDate >=GETDATE() and Status=1 and  AllocateFromID=@adminID  and AllocateFrom='C'                 
       set @a1=@a1-@a2
  end         
IF @a1=0 or @a1<0
BREAK
ELSE
CONTINUE

END 

  
   set @RetValue= 1 
 end
      return @Retvalue
      
end