Getting io.realm.exceptions.RealmMigrationNeededException randomly

This crash happens randomly when getting Realm configuration and does not happen during the actual migration part.

Realm Configuration Code

private static int realmDBVersion = 10;
        if(mRealmConfiguration==null)
        {
                mRealmConfiguration = new RealmConfiguration.Builder()
                        .name(dbFileName + ".realm")
                        .encryptionKey(password)
                        .schemaVersion(realmDBVersion)
                        .migration(new MyRealmMigration())
                        .build();
        }
        return mRealmConfiguration;

MyRealmMigration code

RealmSchema schema = realm.getSchema();

   if(oldVersion ==9){
            schema.create("CodeTypeItemAuxiliary");

            RealmObjectSchema formMappingAreaSchema = schema.get("FormMappingArea");
            RealmObjectSchema codeTypeItem = schema.get("CodeTypeItem");
            RealmObjectSchema codeTypeItemAuxiliary = schema.get("CodeTypeItemAuxiliary");

            codeTypeItemAuxiliary
                    .addField("objectId",int.class, FieldAttribute.PRIMARY_KEY)
                    .addField("codeTypeItemId", String.class)
                    .addField("formFieldAttribute", String.class)
                    .addField("value", String.class);

            formMappingAreaSchema.addField("formFieldAttribute", String.class);
            codeTypeItem.addRealmListField("codeTypeItemAuxiliaryList",codeTypeItemAuxiliary);

            oldVersion++;
        }

Version of Realm and tooling

Realm version(s): 3.3.1

Realm sync feature enabled: no

Android Studio version: 2.3.3

Which Android version and device: Samsung S7

[Zhuinden]

If you did all this config initialization in Application.onCreate() then this problem would not be possible.

[cmelchior]

Closing due to no response. @rahulmenezes feel free to reopen if you have new information.