Base language 1 (ancient): Foo {STRING}
Base language 2 (old): Foo
Base language 3 (current): Foo {STRING}

Translation 1 (ancient): Bar {STRING}
Translation 2 (current): Bar
Translation 3 (newly entered): Bar {STRING}

Translation 3 "Bar {STRING}" is ignored on submission, because it matches the latest translation for base "Foo {STRING}".
Translation 2 "Bar" remains latest translations.