TYPO3 Core

If a field is defined as mergeIfNotBlank and a null value is in default language, it fails with the exception

#1488634845: Issued data-map change for table tx_news_domain_model_news with same values for these fields names author (More information)

How to reproduce

1. Latest master
2. Clone git@github.com:georgringer/news.git
3. Create a news record
4. Use query update tx_news_domain_model_news set author=null where uid=126 (of course use correct uid)
5. try to translate this error

Additional problem

maybe a separate issue worth?

If the default record got some relations, e.g. sys_file_reference, the exception stops the translation but the references are doubled in the default record. this can be checked by e.g. select * from sys_file_reference where uid_foreign=126