Path: $GLOBALS[‘TCA’][$table][‘columns’][$field][‘config’] Type: boolean Scope: Display / Proc. Types: group, selec
Allows the same item more than once in a list.
If used with bidirectional MM relations it must be set for both the native and foreign field configuration.
The property MM_hasUidField must be set whenever
multipleis used. Otherwise sorting and removing relations will be buggy.