diff --git a/openslides/core/static/js/core/base.js b/openslides/core/static/js/core/base.js
index 1dea1621a..b83f5ec29 100644
--- a/openslides/core/static/js/core/base.js
+++ b/openslides/core/static/js/core/base.js
@@ -230,7 +230,7 @@ angular.module('OpenSlidesApp.core', [
             var Resource = DS.definitions[collection];
             if (Resource.relationList) {
                 Resource.relationList.forEach(function (relationDef) {
-                    if (relationDef.foreignKey) {
+                    if (relationDef.foreignKey && !relationDef.osProtectedRelation) {
                         var query = {};
                         query[relationDef.foreignKey] = instance[Resource.idAttribute];
                         Resource.getResource(relationDef.relation).ejectAll(query);
diff --git a/openslides/motions/static/js/motions/motion-block.js b/openslides/motions/static/js/motions/motion-block.js
index 19e596b23..fcd2d0774 100644
--- a/openslides/motions/static/js/motions/motion-block.js
+++ b/openslides/motions/static/js/motions/motion-block.js
@@ -36,6 +36,7 @@ angular.module('OpenSlidesApp.motions.motionBlock', [])
                     'motions/motion': {
                         localField: 'motions',
                         foreignKey: 'motion_block_id',
+                        osProtectedRelation: true,
                     }
                 },
             }