Ticket #2086: 2086.patch

src/main/java/org/sophie2/base/model/book/persist/ChannelPersister.java

@@ -70 +70 @@
                 MasterPersister.persist(sizeRef, storage.attribute("size"), options,
                                         PersistenceUtil.getStorageR3Schema(Integer.class));
                 
+                if (sizeRef.get() == null) {
+                        sizeRef.set(0);
+                }
+                
                 for (int i = 0; i < sizeRef.get(); i++) {
                         final int index = i;
                         Storage entryStorage = storage.childAt("entry", index);