diff --git a/html/admin/sql/patch/upgrade88.sql b/html/admin/sql/patch/upgrade88.sql
new file mode 100644
index 000000000..5d9ccd2f0
--- /dev/null
+++ b/html/admin/sql/patch/upgrade88.sql
@@ -0,0 +1,44 @@
+begin;
+
+update quant_sold set qs_price=abs(qs_price)*(-1), qs_vat=abs(qs_vat)*(-1), qs_quantite=abs(qs_quantite)*(-1) where qs_price < 0 or qs_quantite < 0 or qs_vat < 0;
+
+update quant_purchase set qp_price=abs(qp_price)*(-1), qp_vat=abs(qp_vat)*(-1), qp_quantite=abs(qp_quantite)*(-1) where qp_price < 0 or qp_quantite < 0 or qp_vat < 0;
+
+
+select comptaproc.fill_quant_fin();
+
+create function comptaproc.quant_purchase_ins_upd () returns trigger
+as
+$$
+	begin
+		if NEW.qp_price < 0 OR NEW.qp_quantite <0 THEN
+			NEW.qp_price := abs (NEW.qp_price)*(-1);
+			NEW.qp_quantite := abs (NEW.qp_quantite)*(-1);
+		end if;
+return NEW;
+end;
+$$ 
+language plpgsql;
+
+drop trigger if exists quant_purchase_ins_upd_tr on quant_purchase ;
+create trigger quant_sold_ins_upd_tr after insert or update on quant_purchase for each row execute procedure comptaproc.quant_purchase_ins_upd();
+
+create function comptaproc.quant_sold_ins_upd () returns trigger
+as
+$$
+	begin
+		if NEW.qs_price < 0 OR NEW.qs_quantite <0 THEN
+			NEW.qs_price := abs (NEW.qs_price)*(-1);
+			NEW.qs_quantite := abs (NEW.qs_quantite)*(-1);
+		end if;
+return NEW;
+end;
+$$ 
+language plpgsql;
+
+drop trigger if exists quant_sold_ins_upd_tr on quant_sold ;
+create trigger quant_sold_ins_upd_tr after insert or update on quant_sold for each row execute procedure comptaproc.quant_sold_ins_upd();
+
+update version set val=89;
+
+commit;
\ No newline at end of file
diff --git a/include/constant.php b/include/constant.php
index d6fb7eaa7..9cefe2133 100644
--- a/include/constant.php
+++ b/include/constant.php
@@ -36,7 +36,7 @@ $version_phpcompta=SVNINFO;
 
 error_reporting (15);
 
-define ("DBVERSION",88);
+define ("DBVERSION",89);
 define ("DBVERSIONREPO",12);
 define ('NOTFOUND','--not found--');