[TYPO3-mvc] error in TCA: (travel) Probably value mismatch with fieldtype.

[Domi]

> as Henjo said, please check out the manual, there is a option called
> "foreign_selector" that might be what you're looking for. If this is not
> working for you with IRRE then the only option you have left is to use a
> TCEmain hook and use it to fill/update the "city" field of your travels
> if the relation is edited from a city record and probably also vice versa.

Hello,

thanks for the answers, I tried all options out and finally decide for 
redesign the data set handling that its more intuitiv with only adding / 
editing the relation in one direction.

Thanks for all the information

Cheers Dominic