2 files changed, 10 insertions, 3 deletions
diff --git a/addons/web/static/src/js/views/list/list_controller.js b/addons/web/static/src/js/views/list/list_controller.js
index dc26a750eb4..cf911ef5398 100644
--- a/addons/web/static/src/js/views/list/list_controller.js
+++ b/addons/web/static/src/js/views/list/list_controller.js
@@ -457,6 +457,7 @@ var ListController = BasicController.extend({
      */
     _saveMultipleRecords: function (recordId, node, changes) {
         var self = this;
+        var fieldName = Object.keys(changes)[0];
         var value = Object.values(changes)[0];
         var recordIds = _.union([recordId], this.selectedRecords);
         var validRecordIds = recordIds.reduce(function (result, nextRecordId) {
@@ -487,7 +488,7 @@ var ListController = BasicController.extend({
                 }
                 Dialog.confirm(this, message, {
                     confirm_callback: () => {
-                        this.model.saveRecords(recordId, validRecordIds)
+                        this.model.saveRecords(recordId, validRecordIds, fieldName)
                             .then(() => {
                                 this._updateButtons('readonly');
                                 const state = this.model.get(this.handle);
diff --git a/addons/web/static/src/js/views/list/list_model.js b/addons/web/static/src/js/views/list/list_model.js
index 900f3764b0e..65526346c8e 100644
--- a/addons/web/static/src/js/views/list/list_model.js
+++ b/addons/web/static/src/js/views/list/list_model.js
@@ -40,12 +40,18 @@ odoo.define('web.ListModel', function (require) {
          * @param {string} referenceRecordId the record datapoint used to
          *  generate the changes to apply to recordIds
          * @param {string[]} recordIds a list of record datapoint ids
+         * @param {string} fieldName the field to write
          */
-        saveRecords: function (referenceRecordId, recordIds) {
+        saveRecords: function (referenceRecordId, recordIds, fieldName) {
             var self = this;
             var referenceRecord = this.localData[referenceRecordId];
             var list = this.localData[referenceRecord.parentID];
-            var changes = this._generateChanges(referenceRecord, {});
+            // generate all record values to ensure that we'll write something
+            // (e.g. 2 records selected, edit a many2one in the first one, but
+            // reset same value, we still want to save this value on the other
+            // record)
+            var allChanges = this._generateChanges(referenceRecord, {changesOnly: false});
+            var changes = _.pick(allChanges, fieldName);
             var records = recordIds.map(function (recordId) {
                 return self.localData[recordId];
             });