diff --git a/db/changes/240601/00-grant_privileges_util_tx.sql b/db/changes/240601/00-grant_privileges_util_tx.sql
new file mode 100644
index 0000000000..bd49f6cb24
--- /dev/null
+++ b/db/changes/240601/00-grant_privileges_util_tx.sql
@@ -0,0 +1,3 @@
+GRANT EXECUTE ON PROCEDURE util.tx_commit TO guest;
+GRANT EXECUTE ON PROCEDURE util.tx_rollback TO guest;
+GRANT EXECUTE ON PROCEDURE util.tx_start TO guest;
diff --git a/db/changes/240601/00-util_tx_commit.sql b/db/changes/240601/00-util_tx_commit.sql
index 47e782987a..f288e5fe3c 100644
--- a/db/changes/240601/00-util_tx_commit.sql
+++ b/db/changes/240601/00-util_tx_commit.sql
@@ -1,5 +1,3 @@
-DROP PROCEDURE IF EXISTS util.tx_commit;
-
 DELIMITER $$
 $$
 /**
@@ -8,7 +6,7 @@ $$
  * @param tx BOOL es true si existe transacción asociada
 */
 
-CREATE DEFINER=`root`@`localhost` PROCEDURE `util`.`tx_commit`(IN tx BOOL)
+CREATE OR REPLACE DEFINER=`root`@`localhost` PROCEDURE `util`.`tx_commit`(IN tx BOOL)
 BEGIN
     IF tx THEN
         COMMIT;
diff --git a/db/changes/240601/00-util_tx_rollback.sql b/db/changes/240601/00-util_tx_rollback.sql
index 1a79479be2..3ec738fa74 100644
--- a/db/changes/240601/00-util_tx_rollback.sql
+++ b/db/changes/240601/00-util_tx_rollback.sql
@@ -1,5 +1,3 @@
-DROP PROCEDURE IF EXISTS util.tx_rollback;
-
 DELIMITER $$
 $$
 /**
@@ -8,7 +6,7 @@ $$
  * @param tx BOOL es true si existe transacción asociada
 */
 
-CREATE DEFINER=`root`@`localhost` PROCEDURE `util`.`tx_rollback`(tx BOOL)
+CREATE OR REPLACE DEFINER=`root`@`localhost` PROCEDURE `util`.`tx_rollback`(tx BOOL)
 BEGIN
     IF tx THEN
         ROLLBACK;
diff --git a/db/changes/240601/00-util_tx_start.sql b/db/changes/240601/00-util_tx_start.sql
index 22d1566428..f4a970c4f7 100644
--- a/db/changes/240601/00-util_tx_start.sql
+++ b/db/changes/240601/00-util_tx_start.sql
@@ -1,4 +1,4 @@
-DROP PROCEDURE IF EXISTS util.tx_start;
+
 
 DELIMITER $$
 $$
@@ -8,7 +8,7 @@ $$
  * @param tx BOOL es true si existe transacción asociada
 */
 
-CREATE DEFINER=`root`@`localhost` PROCEDURE `util`.`tx_start`(tx BOOL)
+CREATE OR REPLACE DEFINER=`root`@`localhost` PROCEDURE `util`.`tx_start`(tx BOOL)
 BEGIN
     IF tx THEN
         START TRANSACTION;