diff --git a/modules/forms/forms-epidemiologia/forms-epidemiologia-schema.ts b/modules/forms/forms-epidemiologia/forms-epidemiologia-schema.ts
index 7b522fe1f2..8b3f74940d 100644
--- a/modules/forms/forms-epidemiologia/forms-epidemiologia-schema.ts
+++ b/modules/forms/forms-epidemiologia/forms-epidemiologia-schema.ts
@@ -117,7 +117,7 @@ FormsEpidemiologiaSchema.post('save', (ficha: any) => {
     const { FormsHistory } = require('./forms-history.schema');
     const history = new FormsHistory(ficha.toJSON());
     history._id = new mongoose.Types.ObjectId();
-    if (ficha.config.configField?.length && !ficha.snvs) {
+    if (ficha.config?.configField?.length && !ficha.snvs) {
         EventCore.emitAsync('alta:fichaEpidemiologica:snvs', ficha);
     }
     history.save();
diff --git a/modules/forms/forms-epidemiologia/forms-epidemiologia.routes.ts b/modules/forms/forms-epidemiologia/forms-epidemiologia.routes.ts
index ce21ca170a..3a4d6c8b2a 100644
--- a/modules/forms/forms-epidemiologia/forms-epidemiologia.routes.ts
+++ b/modules/forms/forms-epidemiologia/forms-epidemiologia.routes.ts
@@ -56,8 +56,8 @@ class FormsEpidemiologiaResource extends ResourceBase {
             }
         },
         codigoSisa: {
-            field: 'secciones.fields.codigoSisa',
-            fn: (value) => (value ? { $type: 'number' } : { $not: { $type: 'number' } })
+            field: 'idCasoSnvs',
+            fn: (value) => (value ? { $nin: [null, ''] } : { $in: [null, ''] })
         },
         estado: {
             field: 'secciones.fields.seguimiento.ultimoEstado.key',