Problem creating row data with relation in console.

I can not create row data manually for field with relation. Does not show any data event they are in related table. It shows "No options available".

Yes same and nearly all my existing relational fields also show NULL since today and cannot be changed or deleted at all.
E.G Update Row ‚Error: Table with requested ID coul not be found‘. Seems all to link to a bigger problem right now.