diff --git a/back/models/invoice-in.js b/back/models/invoice-in.js
new file mode 100644
index 000000000..6fa1fa0e1
--- /dev/null
+++ b/back/models/invoice-in.js
@@ -0,0 +1,9 @@
+let UserError = require('vn-loopback/util/user-error');
+
+module.exports = Self => {
+    Self.rewriteDbError(function(err) {
+        if (err.code === 'ER_ROW_IS_REFERENCED')
+            return new UserError(`This invoice has a linked vehicle.`);
+        return err;
+    });
+};