diff --git a/src/js/store/modules/collection/actions.js b/src/js/store/modules/collection/actions.js
index db8bb9abb..f0535047d 100644
--- a/src/js/store/modules/collection/actions.js
+++ b/src/js/store/modules/collection/actions.js
@@ -254,7 +254,6 @@ export const updateCollection = ({ commit }, {
 export const sendCollection = ( { commit }, collection) => {
     return new Promise(( resolve, reject ) => {
         let param = collection;
-        param['mapper'] = null;
         param[tainacan_plugin.exposer_mapper_param] = collection.mapper;
         axios.tainacan.post('/collections/', param)
             .then( res => {