[Bug] Using a `table` type field in a classification store does not work

[mcop1]

Leads to an error when you try to add the classification store to the data object:

How to reproduce:

1.) Add a table type field as key

2.) Add the key to a group, e.g. Dimensions
3.) Go to a data object
4.) Try to add the cstore
5.) Nothing happens, check the console, find the error (see screenshot above)

[kingjia90]

Fixed by pimcore/pimcore#17794