cursor firebird move some rows tableA to tableB

Question

I want to move specific lines (some fields) from a tableA to a tableB by deleting these rows from tableA.

I use Delphi version Rio with FireDAC with Firebird RDMBS.

1. I use a procedure to move and delete a single line
2. I can not use this cursor to move multiple lines

I use procedure 1 to move and delete a single line. The problem is that when I use the procedure 2 (EXECUTE PROCEDURE "PRST_RetransFert";) I get an error message:

Engine Error (code = 335544336): deadlock.
update conflicts with concurrent update.
concurrent transaction number is 41556.
At procedure 'PRST_INSERTMEMODELETTRANSF' line: 36, col: 3
At procedure 'PRST_RetransFert' line: 13, col: 15.
SQL Error (code = -913): deadlock.

This procedure alone works fine.

RECREATE PROCEDURE PRST_INSERTMEMODELETTRANSF (
 IDTRANSFMEMO INTEGER)
AS 
declare variable numero varchar(10);
declare variable sommetransf decimal(15,2);
declare variable crdtransf smallint;
declare variable marge decimal(15,2);
declare variable idut integer;
declare variable idcl integer;
declare variable optionenvoie integer;
declare variable idop integer;
declare variable idoptionoperat integer;
declare variable naturetransf varchar(25);
declare variable codetransfert varchar(25);
declare variable coderapel varchar(25);
declare variable codepin varchar(25);
declare variable avantconnect smallint;
declare variable etattransf varchar(255);
begin
  /* Procedure Text */
   :etattransf = '....NON TRANSMIS RETRANSFERE EN ATTENTE.....' ;
   :AVANTCONNECT = 0 ;
   select numero ,somme ,credit_cl ,marge,id_ut ,
                    id_cl , option_envoie ,id_op  ,id_option_operat
                    ,nature_transf ,code_transfert  , code_rapel  ,Code_pin
                    from  v_nontransmi  where id_transfmemo = :idtransfmemo
                      into :numero,:sommetransf , :CRDTRANSF , :marge  , :idut
                                         , :idcl   , :optionenvoie   , :idop  , idoptionoperat  , :naturetransf
                                           , :codetransfert , :coderapel , :codepin ;

  insert  into transfertsmemoire (numero, somme_transf, crd_transf, marge, id_ut, etat_transf, id_cl, avant_connect,
                                 option_envoie, id_op, id_option_operat, nature_transf, code_transfert, code_rapel, code_pin)
                          Values (:Numero,:sommetransf, :crdtransf,:marge,:idut,:etattransf,:idcl, :avantconnect,:optionenvoie,:idop,
                                 :idoptionoperat,:naturetransf,:codetransfert,:coderapel,:codepin);

  delete from transferts where id_transfmemo = :idtransfmemo ;
--  suspend;
end

I can not use this SP to move multiple lines

RECREATE PROCEDURE "PRST_RetransFert"
AS 
declare variable id_trsMem integer ;  
declare curIdMemoTran Cursor for 
  (select id_transfmemo from v_nontransmi);
   begin  
    open curIdMemoTran;
      while (row_count > 0) do
          begin
              fetch curIdMemoTran into :id_trsMem ;
              execute procedure prst_insertmemodelettransf (:id_trsMem);
              if (row_count = 0) then leave;
            suspend;
          end
  close curIdMemoTran ;
end