# Introduction Fixes https://github.com/twentyhq/private-issues/issues/371 We weren't strictly validating relation field collision on join column name availability of the target field object ## Refactor Extracted morph or relation specific condition out of the common flat field metadata name validate availability to be located in the dedicated morph or relation flat field validator ## Tests Added two tests, ONE_TO_MANY and MANY_TO_ONE in order to cover the use case