diff --git a/modules/client/back/models/XDiario.json b/modules/client/back/models/XDiario.json
index e1eac2aa1..5c277783a 100644
--- a/modules/client/back/models/XDiario.json
+++ b/modules/client/back/models/XDiario.json
@@ -80,8 +80,11 @@
 		"enlazado": {
 			"type": "boolean"
 		},
-		"CLAVE": {
-			"type": "number"
+		"key": {
+			"type": "number",
+			"mysql": {
+				"columnName": "CLAVE"
+			}
 		}
     },
 	"relations": {
diff --git a/modules/invoiceIn/back/methods/invoice-in/specs/toUnbook.spec.js b/modules/invoiceIn/back/methods/invoice-in/specs/toUnbook.spec.js
new file mode 100644
index 000000000..b7d98e307
--- /dev/null
+++ b/modules/invoiceIn/back/methods/invoice-in/specs/toUnbook.spec.js
@@ -0,0 +1,32 @@
+const models = require('vn-loopback/server/server').models;
+
+describe('invoiceIn toUnbook()', () => {
+    it('should check that invoiceIn is unbooked', async() => {
+        const userId = 1;
+        const ctx = {
+            req: {
+
+                accessToken: {userId: userId},
+                headers: {origin: 'http://localhost:5000'},
+            }
+        };
+        const invoiceInId = 1;
+        const tx = await models.InvoiceIn.beginTransaction({});
+        const options = {transaction: tx};
+
+        try {
+            await models.InvoiceIn.toBook(ctx, invoiceInId, options);
+            const bookEntry = await models.InvoiceIn.toUnbook(ctx, invoiceInId, options);
+            const invoiceIn = await models.InvoiceIn.findById(invoiceInId, null, options);
+
+            expect(bookEntry.accountingEntries).toEqual(4);
+            expect(bookEntry.isLinked).toBeFalsy();
+            expect(invoiceIn.isBooked).toEqual(false);
+
+            await tx.rollback();
+        } catch (e) {
+            await tx.rollback();
+            throw e;
+        }
+    });
+});
diff --git a/modules/invoiceIn/back/methods/invoice-in/toUnbook.js b/modules/invoiceIn/back/methods/invoice-in/toUnbook.js
index 1aa25ed0b..dca0d84dc 100644
--- a/modules/invoiceIn/back/methods/invoice-in/toUnbook.js
+++ b/modules/invoiceIn/back/methods/invoice-in/toUnbook.js
@@ -19,7 +19,7 @@ module.exports = Self => {
         }
     });
 
-    Self.toUnbook = async(ctx, id, options) => {
+    Self.toUnbook = async(ctx, invoiceInId, options) => {
         let tx;
         const models = Self.app.models;
         const myOptions = {userId: ctx.req.accessToken.userId};
@@ -36,27 +36,27 @@ module.exports = Self => {
             let isLinked;
             let accountingEntries;
 
-            let {'ASIEN': bookEntry} = await models.Xdiario.findOne({
+            let bookEntry = await models.Xdiario.findOne({
                 fields: ['ASIEN'],
                 where: {
                     and: [
-                        {'CLAVE': id},
+                        {key: invoiceInId},
                         {enlazado: 0},
                         {enlazadoSage: 0}
                     ]
                 }
             }, myOptions);
 
-            if (bookEntry) {
-                accountingEntries = await models.Xdiario.count({ASIEN: bookEntry}, myOptions);
+            if (bookEntry?.ASIEN) {
+                accountingEntries = await models.Xdiario.count({ASIEN: bookEntry.ASIEN}, myOptions);
 
-                await models.Xdiario.destroyAll({ASIEN: bookEntry}, myOptions);
-                await Self.updateAll({id}, {isBooked: false}, myOptions);
+                await models.Xdiario.destroyAll({ASIEN: bookEntry.ASIEN}, myOptions);
+                await Self.updateAll({id: invoiceInId}, {isBooked: false}, myOptions);
             } else {
                 const linkedBookEntry = await models.Xdiario.findOne({
                     fields: ['ASIEN'],
                     where: {
-                        CLAVE: id,
+                        key: invoiceInId,
                         and: [{or: [{enlazado: true, enlazadoSage: true}]}]
                     }
                 }, myOptions);
@@ -68,7 +68,7 @@ module.exports = Self => {
 
             return {
                 isLinked,
-                bookEntry,
+                bookEntry: bookEntry?.ASIEN,
                 accountingEntries
             };
         } catch (e) {