diff --git a/db/dump/fixtures.sql b/db/dump/fixtures.sql
index b46056135..5b7ac3240 100644
--- a/db/dump/fixtures.sql
+++ b/db/dump/fixtures.sql
@@ -1882,6 +1882,7 @@ INSERT INTO `postgresql`.`calendar_state` (`calendar_state_id`, `type`, `rgb`, `
 
 INSERT INTO `postgresql`.`calendar_employee` (`business_id`, `calendar_state_id`, `date`) 
     VALUES 
+        (1,    6, IF(MONTH(CURDATE()) = 12 AND DAY(CURDATE()) > 10, DATE_ADD(CURDATE(), INTERVAL -10 DAY), DATE_ADD(CURDATE(), INTERVAL 10 DAY))),
         (1106, 1, IF(MONTH(CURDATE()) = 12 AND DAY(CURDATE()) > 10, DATE_ADD(CURDATE(), INTERVAL -10 DAY), DATE_ADD(CURDATE(), INTERVAL 10 DAY))),
         (1106, 1, IF(MONTH(CURDATE()) = 12 AND DAY(CURDATE()) > 10, DATE_ADD(CURDATE(), INTERVAL -11 DAY), DATE_ADD(CURDATE(), INTERVAL 11 DAY))),
         (1106, 1, IF(MONTH(CURDATE()) = 12 AND DAY(CURDATE()) > 10, DATE_ADD(CURDATE(), INTERVAL -12 DAY), DATE_ADD(CURDATE(), INTERVAL 12 DAY))),
diff --git a/loopback/locale/es.json b/loopback/locale/es.json
index e42c13c72..a54d2169f 100644
--- a/loopback/locale/es.json
+++ b/loopback/locale/es.json
@@ -193,6 +193,7 @@
 	"Client assignment has changed": "He cambiado el comercial ~*\"<{{previousWorkerName}}>\"*~ por *\"<{{currentWorkerName}}>\"* del cliente [{{clientName}} ({{clientId}})]({{{url}}})",
 	"None": "Ninguno",
 	"The contract was not active during the selected date": "El contrato no estaba activo durante la fecha seleccionada",
+	"Cannot add more than one '1/2 day vacation'": "No puedes añadir más de un 'Vacaciones 1/2 dia'",
 	"This document already exists on this ticket": "Este documento ya existe en el ticket",
 	"Some of the selected tickets are not billable": "Algunos de los tickets seleccionados no son facturables",
 	"You can't invoice tickets from multiple clients": "No puedes facturar tickets de multiples clientes",
diff --git a/modules/worker/back/methods/worker/createAbsence.js b/modules/worker/back/methods/worker/createAbsence.js
index b276cf1f7..89830197d 100644
--- a/modules/worker/back/methods/worker/createAbsence.js
+++ b/modules/worker/back/methods/worker/createAbsence.js
@@ -65,6 +65,23 @@ module.exports = Self => {
             if (args.dated < labour.started || (labour.ended != null && args.dated > labour.ended))
                 throw new UserError(`The contract was not active during the selected date`);
 
+            const result = await Self.rawSql(
+                `SELECT COUNT(*) halfHolidayCounter
+                    FROM vn.calendar c 
+                        JOIN postgresql.business b ON b.business_id = c.businessFk 
+                        JOIN postgresql.profile p ON p.profile_id = b.client_id 
+                        JOIN vn.person pe ON pe.id = p.person_id 
+                    WHERE c.dayOffTypeFk = 6 
+                        AND pe.workerFk = ? 
+                        AND c.dated BETWEEN util.firstDayOfYear(CURDATE()) 
+                        AND LAST_DAY(DATE_ADD(NOW(), INTERVAL 12-MONTH(NOW()) MONTH))`, [args.id]);
+
+            const hasHalfHoliday = result[0].halfHolidayCounter > 0;
+            const isHalfHoliday = args.absenceTypeId == 6;
+
+            if (isHalfHoliday && hasHalfHoliday)
+                throw new UserError(`Cannot add more than one '1/2 day vacation'`);
+
             const absence = await models.Calendar.create({
                 businessFk: labour.businessFk,
                 dayOffTypeFk: args.absenceTypeId,
diff --git a/modules/worker/back/methods/worker/specs/createAbsence.spec.js b/modules/worker/back/methods/worker/specs/createAbsence.spec.js
index f2c00e804..0d6ebfc80 100644
--- a/modules/worker/back/methods/worker/specs/createAbsence.spec.js
+++ b/modules/worker/back/methods/worker/specs/createAbsence.spec.js
@@ -74,4 +74,32 @@ describe('Worker createAbsence()', () => {
             throw e;
         }
     });
+
+    it(`should throw an error when adding a "Half holiday" absence if there's already one`, async() => {
+        const ctx = {
+            req: {accessToken: {userId: 19}},
+            args: {
+                id: 1,
+                businessFk: 1,
+                absenceTypeId: 6,
+                dated: new Date()
+            }
+        };
+
+        const tx = await app.models.Calendar.beginTransaction({});
+
+        let error;
+        try {
+            const options = {transaction: tx};
+
+            await app.models.Worker.createAbsence(ctx, workerId, options);
+
+            await tx.rollback();
+        } catch (e) {
+            await tx.rollback();
+            error = e;
+        }
+
+        expect(error.message).toEqual(`Cannot add more than one '1/2 day vacation'`);
+    });
 });